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Which UWA for my A7
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PostPosted: Sun Jan 26, 2014 8:36 pm    Post subject: Which UWA for my A7 Reply with quote
I have no UWA in my collection. I would like something like 20-21 mm . No fish-eye.
I found a SMC Takumar 20mm 4,5 for 180 €.
What would you recommend ?
I have read that range-finder UWAs are not suitable for the A7 ( sensor issue).
Thanks
Philippe


PostPosted: Sun Jan 26, 2014 9:25 pm    Post subject: Reply with quote
You cannot generalize that. First of all you're lucky that you have the A7 and not the A7R, because the A7 seems to be more suitable for manual lenses.
As far as rangefinder lenses are concerned, the CV 4.5/15 causes colourshift in the corners whereas the 5.6/12 doesn't, so they say.
You can use the APS 10-18 for NEX in the crop mode of the A7 with pretty good results.


PostPosted: Sun Jan 26, 2014 10:09 pm    Post subject: Reply with quote
I have the 7R and have the following:
Voigtlander 15mm f4.5
Voigtlander 21mm f1.8
Nikon AF-D 20mm f2.8

The 15mm does have a colour shift (but really no worse than when used on a nex 7). It is pretty sharp across the frame but needs PP to be usable (as it did with the nex7). The 21mm f1.8 is very sharp but does vignette wide open. It's a little heavy and not cheap but an impressive lens. The nikon I have for my slr rig. I found ion general SLR lenses vignette less than the rangefinder equivalents and it's still true of the two 20/21mms but at f2.8 it's not a hug difference. The voigtlander is sharper than the nikon, even with both wide open (but my nikon is a bit battered).
Not really offering any recommendations, just experience! My only issue with the cv lens is the weight, I shoot longer FLs I general, so I half think a f2.8 would be a better aperture for me as it's less to carry. The 15 is stupidly light of course.


PostPosted: Sun Jan 26, 2014 10:12 pm    Post subject: Reply with quote
I have the 7R and have the following:
Voigtlander 15mm f4.5
Voigtlander 21mm f1.8
Nikon AF-D 20mm f2.8

The 15mm does have a colour shift (but really no worse than when used on a nex 7). It is pretty sharp across the frame but needs PP to be usable (as it did with the nex7). The 21mm f1.8 is very sharp but does vignette wide open. It's a little heavy and not cheap but an impressive lens. The nikon I have for my slr rig. I found ion general SLR lenses vignette less than the rangefinder equivalents and it's still true of the two 20/21mms but at f2.8 it's not a hug difference. The voigtlander is sharper than the nikon, even with both wide open (but my nikon is a bit battered).
Not really offering any recommendations, just experience! My only issue with the cv lens is the weight, I shoot longer FLs I general, so I half think a f2.8 would be a better aperture for me as it's less to carry. The 15 is stupidly light of course.


PostPosted: Sun Jan 26, 2014 10:12 pm    Post subject: Reply with quote
Voigtländer Color Scopar 20/3.5 II maybe
http://soundimageplus.blogspot.de/2013/12/sony-a7r-voigtlander-20mm-f35-color.html
Or Voigtländer Ultron 21/1.8 (expensive) also seems to work very nice (a few samples with A7/r at SteveHuffs website)

What's your price limit?
Does the lens have to be very good from corner to corner?
MF lenses only? Do you consider LAEA4 or similar adapter?


PostPosted: Sun Jan 26, 2014 10:21 pm    Post subject: Reply with quote
Used Samyang 14mm 2.8 manual focus in nikon/canon mount


PostPosted: Mon Jan 27, 2014 1:15 am    Post subject: Reply with quote
DahakaNishoba wrote:
Used Samyang 14mm 2.8 manual focus in nikon/canon mount

+1
Not exactly 20mm Wink, it's quite large and there's a lot vignetting at wide apertures on FF but very sharp and stopped down good from corner to corner. It's also quite cheap!


PostPosted: Mon Jan 27, 2014 5:28 am    Post subject: Reply with quote
ForenSeil wrote:
DahakaNishoba wrote:
Used Samyang 14mm 2.8 manual focus in nikon/canon mount

+1
Not exactly 20mm Wink, it's quite large and there's a lot vignetting at wide apertures on FF but very sharp and stopped down good from corner to corner. It's also quite cheap!

You can use Samyang 14mm in crop mode and it will became 20/21mm lens Smile Smile Smile


PostPosted: Mon Jan 27, 2014 5:57 am    Post subject: Re: Which UWA for my A7 Reply with quote
memetph wrote:
I have no UWA in my collection. I would like something like 20-21 mm . No fish-eye.
I found a SMC Takumar 20mm 4,5 for 180 €.
What would you recommend ?
I have read that range-finder UWAs are not suitable for the A7 ( sensor issue).
Thanks
Philippe

Avoid the takumar, its got heavy barrel distortion, almost like a semi fisheye.


PostPosted: Mon Jan 27, 2014 6:25 am    Post subject: Reply with quote
Thank you for the feed back.
I consider only mf and real FF.
I bought this camera to use my old mf lenses.

I have a Pana with the 7/14 zoom that why I want real FF with this UWA.


PostPosted: Mon Jan 27, 2014 6:43 am    Post subject: Re: Which UWA for my A7 Reply with quote
hifisapi wrote:
memetph wrote:
I have no UWA in my collection. I would like something like 20-21 mm . No fish-eye.
I found a SMC Takumar 20mm 4,5 for 180 €.
What would you recommend ?
I have read that range-finder UWAs are not suitable for the A7 ( sensor issue).
Thanks
Philippe

Avoid the takumar, its got heavy barrel distortion, almost like a semi fisheye.


do you know if this also is true for the Pentax M f4/20mm? A lens that has attracted me more than the Takumar, mostly for it's much smaller size.
Talking about wide angle SLR lens but compact of course also Olympus Om Zuikos f3.5/21mm and f2/21mm come to my mind, both said to be very good performers, I think.
I am surprised no one yet has mentioned the Vivitar / Tokina f3.5/17mm which used to be recommended in this forum a lot, just like the Flektogons and I like my MIR f2.5/20, there also is a Mir f3.5/20.
That's all SLR lenses which means much bigger than RF lenses of course, but the O.P. has been considering the Takumar which is big and all these lenses most likely won't have corner issues.


PostPosted: Mon Jan 27, 2014 10:25 am    Post subject: Reply with quote
Have you tried the Mir 20mm with a FF camera?
My Mir 1b 37mm is very bad in the corner in FF , a real pity because I like it very much.


PostPosted: Mon Jan 27, 2014 10:35 am    Post subject: Reply with quote
I would suggest the Olympus 21mm, since is very compact and great lens...
In full-frame (5d2) the corners will come a little more darker so in A7 should be the same.


PostPosted: Mon Jan 27, 2014 10:47 am    Post subject: Reply with quote
again.. what's your price limit? And how big/heavy can it be?


PostPosted: Mon Jan 27, 2014 11:10 am    Post subject: Re: Which UWA for my A7 Reply with quote
Quote:
do you know if this also is true for the Pentax M f4/20mm?


The smc M20/4 on crop sensor? or on FF?
I havent try it on canon FF, but on a pentax, it delivers very good results. Can't see any barrel.

Zuiko 21/3.5 (mc and non-mc) also very good on canon FF. About the same size og pentax.

Nikon 20/3.5 ais is bigger.

Vivitar/Tokina f3.5/17mm is sharp and wide, but i don't like the rending/color as smc or zuiko mc.
Colors are a bit flat, less contrast.


PostPosted: Mon Jan 27, 2014 12:24 pm    Post subject: Reply with quote
Nikon ai 20/4 is tiny and a very good performer. Very similar to the Pentax isn't it?


PostPosted: Mon Jan 27, 2014 12:31 pm    Post subject: Reply with quote
Yes it is about the same size, but i never tried.


PostPosted: Mon Jan 27, 2014 12:50 pm    Post subject: Re: Which UWA for my A7 Reply with quote
kuuan wrote:
hifisapi wrote:
memetph wrote:
I have no UWA in my collection. I would like something like 20-21 mm . No fish-eye.
I found a SMC Takumar 20mm 4,5 for 180 €.
What would you recommend ?
I have read that range-finder UWAs are not suitable for the A7 ( sensor issue).
Thanks
Philippe

Avoid the takumar, its got heavy barrel distortion, almost like a semi fisheye.


do you know if this also is true for the Pentax M f4/20mm? A lens that has attracted me more than the Takumar, mostly for it's much smaller size.
Talking about wide angle SLR lens but compact of course also Olympus Om Zuikos f3.5/21mm and f2/21mm come to my mind, both said to be very good performers, I think.
I am surprised no one yet has mentioned the Vivitar / Tokina f3.5/17mm which used to be recommended in this forum a lot, just like the Flektogons and I like my MIR f2.5/20, there also is a Mir f3.5/20.
That's all SLR lenses which means much bigger than RF lenses of course, but the O.P. has been considering the Takumar which is big and all these lenses most likely won't have corner issues.
while I haven't tried the M lens on FF, its much better than the takumar with regards to distortion on crop.


PostPosted: Mon Jan 27, 2014 4:39 pm    Post subject: Reply with quote
Tedat wrote:
again.. what's your price limit? And how big/heavy can it be?


400/500 € . Second hand is ok.
Size? I don't know but an SLR lens is Ok . I has not to be a Rf lens.


PostPosted: Mon Jan 27, 2014 5:02 pm    Post subject: Reply with quote
memetph wrote:
Have you tried the Mir 20mm with a FF camera?
My Mir 1b 37mm is very bad in the corner in FF , a real pity because I like it very much.


no I haven't, with Vivitar/Tokina, Flektogons and Mirs I merely mentioned those which used to be recommended here often, though most users then might have been using APS-C.
see samples taken with the Mir 3.5/20 on 35mm film: http://www.flickr.com/search/?w=23865740@N00&q=mir%2020M
and taken with the Mir 2.5/20 on film: http://www.flickr.com/search/?w=7667916@N03&q=mir%2047


PostPosted: Mon Jan 27, 2014 8:51 pm    Post subject: Reply with quote
It looks good on 35mm film. Have you both lenses? I don't care if the lens is not very fast ( I was considering the Takumar f4,5 ).
I could get a Mir 20mm 3,5 for 100-150 € .


PostPosted: Mon Jan 27, 2014 9:31 pm    Post subject: Reply with quote
memetph wrote:
It looks good on 35mm film. Have you both lenses? I don't care if the lens is not very fast ( I was considering the Takumar f4,5 ).
I could get a Mir 20mm 3,5 for 100-150 € .


The f3.5 Mir is a nice lens: it is sharp, it shows good color rendition, more than decent distortion control, and it's not too big (quite smaller than a flektogon 20/4). IMHO for 100€ is a goot deal. On the other hand, it flares like mad because of its big convex front element, and one of the two copies I've had had some slightly annoying mechanical plays (the other one was much better) : nothing extremely serious, but better knowing it before.

If I had to buy a wide for FF in the 400-500€ price range now, it would be the zeiss distagon 25 2.8 for contax without hesitation, but I understand it may not be wide enough.


PostPosted: Mon Jan 27, 2014 9:54 pm    Post subject: Reply with quote
yes it is not wide enough as the first test I did with my SMC 28mm 3,5 is satifying ( I bought this lens in 1970 ! )
I found an offer for a Mir 3,5 MC including a hood. It looks there are two versions , single or multi coated.

The Mir seems cheap . I should perhaps try it and sell it if I don't like it. I won't loose much money.
The Olympus looks much more compact. I shall try to find some users feed back..


PostPosted: Mon Jan 27, 2014 10:16 pm    Post subject: Reply with quote
memetph wrote:

I found an offer for a Mir 3,5 MC including a hood. It looks there are two versions , single or multi coated.

Yes, I have had two copies of the MC version, so all the things I said above were referred to the MC Mir 20 M.


PostPosted: Mon Jan 27, 2014 10:20 pm    Post subject: Reply with quote
Im not sure if you can find one for 500 euro but the smc pentax k 18mm f3.5 lens
is excellent in all respects if a little large in length of the barrel. sharp, high contrast,
excellent color saturation, low distortion. built in filters. excellent build.
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