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All other DSLR's and Four Thirds, 4/3 All DSLRs excluding Canon and Nikon mounts ie Sigma, Pentax, Olympus, Sony, Leica R Back DSLRs and 4/3 System

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  #31  
Old September 6th, 2011, 07:49 AM
Murray Foote Murray Foote is offline
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Quote:
Originally Posted by Mike Shimwell View Post
Murray, perhaps worth being aware that lloyd's focus is more technical and tripod based than sean's. Probably appeal to different markets. Sean's best articled, imho, have been aboit making pivtures rather than gear reviews, but they seem to have slowed down at the moment.
Thanks for clarifying that Mike. I've just subscribed.
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  #32  
Old September 6th, 2011, 09:07 AM
Jerome Marot Jerome Marot is offline
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Originally Posted by Mike Shimwell View Post
- the m lenses don't always work that well on these cameras. Leica had to work hard to get to the m9, and there are still residual red edge issues with some zeiss wide angles.
The M9 is a full-frame camera and these issues are much smaller on half-frame cameras. And word is that the Nex 5 sensor is quite exempt of these artifacts. Apparently, the design of the sensor is different, but Sony won't say.

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Originally Posted by Mike Shimwell View Post
You could buy a M4/3 and a clip on optical viewfinder. The Panasonic 1.7/20 is supposed ot be a cracking lens that would meet your needs. Add the voigt 0.95/25 (manual focus only) and you'd be about there.
I don't see the point in having the 20mm and 25mm, the angle of view is very similar. I would also like to point out that Sony has an optical viewfinder for the Nex 3 or 5 and the 16mm and that these optical viewfinder are not always very convenient: they make the camera quite a lot more bulky in a bag and you don't get any info on what the camera is doing.
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  #33  
Old September 7th, 2011, 03:18 AM
Mike Shimwell Mike Shimwell is offline
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Quote:
Originally Posted by Jerome Marot View Post
The M9 is a full-frame camera and these issues are much smaller on half-frame cameras. And word is that the Nex 5 sensor is quite exempt of these artifacts. Apparently, the design of the sensor is different, but Sony won't say.



I don't see the point in having the 20mm and 25mm, the angle of view is very similar. I would also like to point out that Sony has an optical viewfinder for the Nex 3 or 5 and the 16mm and that these optical viewfinder are not always very convenient: they make the camera quite a lot more bulky in a bag and you don't get any info on what the camera is doing.

Hi Jerome,

Yes, the issues are less problematic on half frame cameras than full frame, but there is a lot of anecdotal comment on fora that people are not getting a step up in 'image quality' from M lenses compared to the system lenses. Plus, you then have to deal with manual focus on a body that is fundamentally designed for autofocus.


I agree that 20 and 25 are quite close, but I use both 35 and 50 (eq 17 and 25) quite distinctly. I supect that 17 to 20 is fairly manageable swap. Also, I know Fahim uses 28 on his M8, which is about half way between 17 and 20 on the M4/3s bodies. (and having said that, perhaps a 33 would be a better replacement for his 50!)

Mike
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  #34  
Old September 7th, 2011, 06:10 AM
Jerome Marot Jerome Marot is offline
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Quote:
Originally Posted by Mike Shimwell View Post
there is a lot of anecdotal comment on fora that people are not getting a step up in 'image quality' from M lenses compared to the system lenses. Plus, you then have to deal with manual focus on a body that is fundamentally designed for autofocus.
They don't get a big step up in quality because the system lenses are not that bad...

About manual focus: the Nex series has introduced a function called "peaking" which really changes the way one focuses on these cameras. It makes manual focus much, much easier. Since the function has been standard on video cameras for years, I expect the other manufacturers to do the same relatively soon.
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  #35  
Old February 4th, 2012, 09:28 AM
Jerome Marot Jerome Marot is offline
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Fuji decided to surprise us with a new camera system dedicated to primes (their optical viewfinder construction precludes the use of zoom lenses, so the list becomes as follows:

Sony NEX
Fuji X-Pro1
Olympus-Panasonic 4/3
Samsung NX
Leica S (not a compact and light system, but a relatively new system with only primes)


__________________fish_______18_______24_______28_______35______40_______50______75______90________135_____


NEX_______________2.8________2.8_____2.8________________1.8________3.5M ________1.8S_______________________

Fuji_X1_______________________________________2.0________________________1.4_____________2.4_______ ________

Olympus _____________________________2.0________________2.8______________________________1.8_______________
Panasonic_________3.5__________________________2.5______________1.7______1.4_____________2.8MS______________

Samsung______________________________2.8___________________________2.0______________________________________

Leica_S2_______________________________________2.5 ________________________2.5________________2.5M___ ____3.5




Small lenses (so called "pancakes") are in magenta. Macro lenses have the letter M, lenses with Optical Stabilisation the letter S. Sony has 2 converters for the 16mm, making it into a wide-angle and fisheye primes, those are listed in grey (are they primes or not?).
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  #36  
Old February 4th, 2012, 10:40 AM
Michael Nagel Michael Nagel is offline
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Quote:
Originally Posted by Jerome Marot View Post
It is not a new camera system, but I think that this comparison would not be complete without adding Pentax, who has a whole line of "limited" primes for their camera system. Interestingly, the focal length available are quite different (there is a glaring hole around the equivalent of the 35mm focal length).

__________________fish_______16_________24_______28_______35______40_______50______75______90________135_____
Pentax lim__________________________4______________3.2______________________2.4_2.8_____1.4____2.4_________
________________________________2.8_______________ ______________________1.8__2.8M_1.9_1.4________1.8________
I have some difficulties reading your diagram here.
I will try with lists of newly available lenses. The focal length for an equivalent FOV on a 36x24mm film/sensor is added in brackets.

DA:
14/2,8 (21)
35/2,4 (52)

DA*:
55/1,4 (80)

DA limited (40 is _the_ pancake, 21 and 70 can be counted as well):
15/4 (22)
21/3,2 (33)
40/2,8 (60)
70/2,4 (105)

DFA (both are macro lenses):
50/2,8 (75)
100/2,8 (150)

FA:
35/2,0 (52)

FA limited:
31/1,8 (43)
43/1,9 (65)
77/1,8 (116)

If we put all 36x24mm film/sensor equivalent FOV focal lengths together, the list looks like this:

21
22
33
43
52
52
60
65
75
80
105
116
150

The largest gap for me is from 22 to 33. Is it this what you wanted to say?

Best regards,
Michael
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  #37  
Old February 4th, 2012, 11:24 AM
Jerome Marot Jerome Marot is offline
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Quote:
Originally Posted by Michael Nagel View Post

The largest gap for me is from 22 to 33. Is it this what you wanted to say?
You are right, the diagram was not correct. This should be better:

__________________fish_______16_________24_______28_______35______40_______50______75______90________135_____
Pentax lim___________________________4________________3.2___________________2.4_2.8_____1.4____2.4_________
________________________________2.8_______________ __________________1.8_____2.8M__1.9_1.4________1.8________
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  #38  
Old February 4th, 2012, 04:56 PM
Murray Foote Murray Foote is offline
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Quote:
Originally Posted by Jerome Marot View Post
Fuji decided to surprise us with a new camera system dedicated to primes (their optical viewfinder construction precludes the use of zoom lenses)....
Not so, it seems http://www.dpreview.com/news/2012/01...jifilm_Roadmap. I have read somewhere that they have a solution to match the viewfinder to zoom lenses.
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  #39  
Old February 4th, 2012, 06:36 PM
Asher Kelman Asher Kelman is offline
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This is more about the NEX 5N itself than primes, as I only tried one expensive Zeiss 24 mm and yes it was perfection.

I have been using the NEX 5N for the past week. I left my Canon armory at home and just had the NEX 5N with the 18-55 (X1.5 for APA-C). Marvelous freedom to compose all day with no schlepping gear. I don't think my pictures are any less useful except I did need the 24mm T/S II when shooting a model in a park and wanted the b.g. Frankly, I found that the focus was so fast and the camera so light but with just enough balance and heft, that I was very, very pleasantly surprised. After a day, my GXR, with the far superior GXR f 2.8 50mm macroi lens, did not even get into my coat pocket. It's unbeatable for macro and slow shooting but it breathes to slowly for fast-paced work. I'll now try the NEX with more primes. I did try a 24mm Zeiss, but it was a little expensive for me for just a fun trip to NY.

What this exercise tells me is that fast focus can trump almost anything else in work with people. If a prime series does that with these wonderful APS-C sensors, there will be lots of winners.

Asher
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  #40  
Old February 5th, 2012, 12:17 AM
Jerome Marot Jerome Marot is offline
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Originally Posted by Asher Kelman View Post
What this exercise tells me is that fast focus can trump almost anything else in work with people.
There is ample evidence against that: so many people pictures have been taken with the Leica M, which is not fast to focus.

I know your next answer: people prefocus on the Leica M. In that case "focus" (or lack of it) is instantaneous. But nothing precludes doing the same on the GXR: youtube example.

But you did not use that function and I would think that few users actually use prefocus on the GXR or similar cameras in the field, while many more Leica M users do so. Why the difference? Because of the ergonomics.

Todays cameras are technically excellent. The differences in quality between them is too small to be significant in the field for the overwhelming majority of pictures. What makes a camera sing is how well the controls are arranged and this is a matter of personal preference: some people are quite happy with the GXR's manual focus. The ergonomics work for them.
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  #41  
Old February 5th, 2012, 12:58 AM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Jerome Marot View Post
Todays cameras are technically excellent. The differences in quality between them is too small to be significant in the field for the overwhelming majority of pictures. What makes a camera sing is how well the controls are arranged and this is a matter of personal preference: some people are quite happy with the GXR's manual focus. The ergonomics work for them.
Jerome,

I was brought up on manual focus with the Retina IIB and a 35mm lens. I beleive it had click stops but I can't swear to that. I knew how to turn the focus and get thing sharp just be looking ahead and moving by feel. With Leica lenses, there's often a lever which gives orientation. With my Bronica, again I can focus by the position of the ring. I need to invest some effort with the GXR on manual to be fair. But for critical work I'd use the GXR over the NEX for 50mm focal length, at least for now.

One bad thing about modern lenses is the fly by wire "manual" rings. We'd be better off with actual manual controls and several turns.

Asher
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  #42  
Old February 5th, 2012, 01:36 AM
Jerome Marot Jerome Marot is offline
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Indeed, free-turn focus wheels lack any reference for the photographer. The same is true from menu-based systems. They can be used to prefocus, but not to focus by estimate and feel.

An interesting solution is used in the Sigma DP1/2: there is a focus wheel separate from the lens. It is not free-turn, there is a stop at infinite. Unfortunately, the angle of turn is very small between infinite and 2m.

That solution is not new, BTW. The first camera I saw it used is the Contax T2:

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  #43  
Old February 14th, 2012, 02:13 AM
Ben Rubinstein Ben Rubinstein is offline
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Bit confused about the diagram, there is no fast 35mm for the NEX system unless I've missed something.
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  #44  
Old February 14th, 2012, 04:54 AM
Jerome Marot Jerome Marot is offline
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Originally Posted by Ben Rubinstein View Post
Bit confused about the diagram, there is no fast 35mm for the NEX system unless I've missed something.
The Zeiss 24mm f/1.8 has an angle of view equivalent to a 35mm lens on a full frame camera.
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  #45  
Old March 19th, 2012, 03:10 PM
Jerome Marot Jerome Marot is offline
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There have been some changes on the compact mirrorless camera market. Sigma announced two new prime lenses, a 19mm and a 30mm, both open at f/2.8 and small enough to be considered as "pancakes". The lenses are available for the NEX and 4/3 systems, so become equivalents of:
-a 28mm and 50mm for NEX and
-a 38mm and 60mm for 4/3.

The ∑19mm is of little interest for the 4/3 system because of the competition of the extraordinary 20mm pancake from Panasonic, but will be a perfect 28mm equivalent for the NEX system. The two Sigma lenses are cheap and, if the MTF curves published on Sigma Japan site any indication, should be quite good.

Samsung has announced a 20mm f/2.8 pancake for their NX system (30mm equivalent) and I corrected the aperture of the 16mm (24mm equivalent) to f/2.4. I wrote f/2.8 by mistake.

The list becomes as follows (in "35mm equivalent focal lengths"):

Sony NEX
Fuji X-Pro1
Olympus-Panasonic 4/3
Samsung NX


__________________fish_______18_______24_______28_______35______40_______50________75______90________135_____


NEX_______________2.8________2.8_____2.8______∑2.8________1.8___________3.5M∑2.8___1.8S_______________________

Fuji_X1_______________________________________2.0__________________________1.4_____________2.4M____ _____________

Olympus _____________________________2.0________________2.8___∑2.8____________∑2.8_________1.8_______________
Panasonic_________3.5__________________________2.5______________1.7______1.4_______________2.8MS______________

Samsung______________________________2.4_________2.8______________________2.0_______________________________



Small lenses (so called "pancakes") are in magenta. Macro lenses have the letter M, lenses with Optical Stabilisation the letter S. Sony has 2 converters for the 16mm, making it into a wide-angle and fisheye primes, those are listed in grey (are they primes or not?).
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  #46  
Old March 23rd, 2012, 09:58 AM
Jerome Marot Jerome Marot is offline
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Originally Posted by Jerome Marot View Post
The two Sigma lenses are cheap and, if the MTF curves published on Sigma Japan site any indication, should be quite good.
Indeed the 30mm is sharp corner to corner. A perfect lens.
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  #47  
Old March 23rd, 2012, 11:13 AM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Jerome Marot View Post

The list becomes as follows (in "35mm equivalent focal lengths"):

Sony NEX
Fuji X-Pro1
Olympus-Panasonic 4/3
Samsung NX


__________________fish_______18_______24_______28_______35______40_______50________75______90________135_____


NEX_______________2.8________2.8_____2.8______∑2.8________1.8___________3.5M∑2.8___1.8S_______________________

Fuji_X1_______________________________________2.0__________________________1.4_____________2.4M____ _____________

Olympus _____________________________2.0________________2.8___∑2.8____________∑2.8_________1.8_______________
Panasonic_________3.5__________________________2.5______________1.7______1.4_______________2.8MS______________

Samsung______________________________2.4_________2.8______________________2.0_______________________________



Small lenses (so called "pancakes") are in magenta. Macro lenses have the letter M, lenses with Optical Stabilisation the letter S. Sony has 2 converters for the 16mm, making it into a wide-angle and fisheye primes, those are listed in grey (are they primes or not?).
Jerome,

Assuming, just for the moment, that one gets pretty much the same 8x10 pictures from 4/3 and APS-C sized sensors, could you now bring in cost and AF. With these considerations, which camera systems can be equipped for the least outlay of cash and still have coverage of focal lengths and AF?

Thanks,

Asher
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  #48  
Old March 23rd, 2012, 12:37 PM
Jerome Marot Jerome Marot is offline
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I don't understand the question. Everyone of the cited lenses is AF. They are all available in the native mount. As to cost of lenses, it really depends on what coverage one wants, what aperture is desired and whether zooms are allowed: what do you mean by "coverage of focal lengths"?. As to cost of bodies, a second hand Olympus EP-1 or NEX 3 is really cheap...

(Since you are in the USA, and because prices are a bit different depending on country, I checked on amazon.com: you can get an Olympus EP-1 or NEX 3 body for 190$ today).
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  #49  
Old March 24th, 2012, 10:20 AM
Asher Kelman Asher Kelman is offline
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Quote:
Originally Posted by Jerome Marot View Post
I don't understand the question. Everyone of the cited lenses is AF. They are all available in the native mount. As to cost of lenses, it really depends on what coverage one wants, what aperture is desired and whether zooms are allowed: what do you mean by "coverage of focal lengths"?. As to cost of bodies, a second hand Olympus EP-1 or NEX 3 is really cheap...

(Since you are in the USA, and because prices are a bit different depending on country, I checked on amazon.com: you can get an Olympus EP-1 or NEX 3 body for 190$ today).
Hi Jerome,

Let me clarify my question. I really like the new batch of compact cameras. The Canon and Nikon DSLR's are so heavy to lug around all day. My experience is limited to just two brands, Ricoh and Sony so I was wondering, overall, which brand offers a good range of prime AF lenses without breaking the bank, preferably APS C sized sensor.

Ricoh: I love the Ricoh GXR, solidly built, with it's 50 mm f 2.5 Macro lens and enclosed sensor unit. The pictures are on a par with full frame camera for most intents. However, the range of primes is limited to that 50 mm and a 28mm APS C units. Zooms are wonderful but have tiny sensors. One can use the M-mount adapter and leverage Leica lenses one owns, but then the focus is manual.

Sony: My experience with the Sony NEX 5N was a quick wonderful romance. The 18-55 zoom, (x1.5) was all I had but it was really practical for a New York "guerilla" shoot. The f 2.0 28mm Zeiss lens offered was just too expensive and has no image stabilization. The 16 mm, f 2.8, (equivalent to 24mm), was not in stock and that's the line up; rather limited! Of course, they have the 2X adapter and ultrawide and fisheye convertors, but these aren't primes. One can use the large heavy prime lenses from the Sony alpha DSLR with an adapter, but hardly practical for a compact system.

So I'm looking out for a fine system with compact AF lenses covering the 35mm equivalent focal lengths of 14-16mm to 120 mm at least.

Asher
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  #50  
Old March 24th, 2012, 12:59 PM
Jerome Marot Jerome Marot is offline
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Originally Posted by Asher Kelman View Post
Sony: My experience with the Sony NEX 5N was a quick wonderful romance. The 18-55 zoom, (x1.5) was all I had but it was really practical for a New York "guerilla" shoot. The f 2.0 28mm Zeiss lens offered was just too expensive and has no image stabilization. The 16 mm, f 2.8, (equivalent to 24mm), was not in stock and that's the line up; rather limited! Of course, they have the 2X adapter and ultrawide and fisheye convertors, but these aren't primes. One can use the large heavy prime lenses from the Sony alpha DSLR with an adapter, but hardly practical for a compact system.
There is no 2x adapter that I know of and the Zeiss is a 24mm f/1.8 on the NEX system. The 16mm f/2.8 pancake has poor corners and, depending on the camera, can vignette like crazy. It can produce great pictures, but is not an universal, sharp-everywhere, wide angle lens. So, for the NEX system you are limited to 28, 35, 50 and 75 35mm equivalents if you want to use primes, and possibly a 24mm equivalent if you can live with the poor corners of the pancake.

The real strength of the NEX system is not the lenses, but the NEX 7 camera with its viewfinder and 3-wheels setup system.


Quote:
So I'm looking out for a fine system with compact AF lenses covering the 35mm equivalent focal lengths of 14-16mm to 120 mm at least.
If these lenses must be primes, that system does not exist.
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  #51  
Old March 25th, 2012, 12:16 AM
Asher Kelman Asher Kelman is offline
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Originally Posted by Jerome Marot View Post
So, for the NEX system you are limited to 28, 35, 50 and 75 35mm equivalents if you want to use primes, and possibly a 24mm equivalent if you can live with the poor corners of the pancake.
Primes that I have found so far are

Rokina fisheye f3.5 8mm, 12mm equivalent MF

Sony 16mm as you have described, 24 mm equivalent

Zeiss 24mm 1.8, 36mm equivalent, AF $999.99

Sony 30mm f/3.5 Macro Lens, 45mm equivalent, AF

Sigma 30mm f2.8, 45mm equivalent, AF

Zeiss 50mm 1.8 AF 75mm equivalent

So that comes out to 12mm, 24mm, 36mm, 45mm and 75mm prime coverage, with the fisheye being MF.

That's pretty good. but where did you find your 28, 35 and 50 mm equivalent primes or are these more like poetic license designation in coverage?

Quote:
Originally Posted by Jerome Marot View Post

The real strength of the NEX system is not the lenses, but the NEX 7 camera with its viewfinder and 3-wheels setup system.
Have you used one yet? Well, I've not held a NEX 7! So far it has not appeared in the Sony flagship store, here in Century City. Maybe it's there by now. I'll recheck.

Asher
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  #52  
Old March 25th, 2012, 07:54 AM
Jerome Marot Jerome Marot is offline
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Originally Posted by Asher Kelman View Post
Primes that I have found so far are

Rokina fisheye f3.5 8mm, 12mm equivalent MF
I don't think it is available yet in the NEX mount, it is not AF and it is a fisheye, so I did not count it.


Quote:
Zeiss 24mm 1.8, 36mm equivalent, AF $999.99
Quote:
Zeiss 50mm 1.8 AF 75mm equivalent
The 50mm is not a Zeiss lens.


Quote:
where did you find your 28, 35 and 50 mm equivalent primes or are these more like poetic license designation in coverage?
"Poetic" license or inaccuracy of the scale for 35mm (I thought about the 24mm, which has a coverage of 36mm and not 35mm) and for 50mm (I thought about the two 30mm lenses, which have a coverage of 45mm). The designation "28mm" was thought for the Sigma 19mm lens, which has a coverage of 28,5mm.


Quote:
Have you used one yet?
Yes, I have acquired one.
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  #53  
Old March 25th, 2012, 10:31 AM
Asher Kelman Asher Kelman is offline
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Thanks Jerome for your detailed knowledge. This is most helpful.

Quote:
Originally Posted by Jerome Marot View Post
I don't think it is available yet in the NEX mount, it is not AF and it is a fisheye, so I did not count it.
It's availble at B&H here right now for $299. It is indeed MF but it is easily set by MF and the DOF makes this simple to get subjects sharp. At that price, it's worth considering. Against that is the bulk and that Sony has wide angle adapters and also a Fisheye adapter matched for their own lenses.

Asher
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