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Explore the world of vintage lenses through repair notes, real test shots, and detailed archive threads packed with images.

Explore the world of vintage lenses through repair notes, real test shots, and detailed archive threads packed with images.
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Digital square Open thread
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Posted: Tue Aug 14, 2012 9:54 pm
Post subject: Digital square Open thread
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Posted: Tue Aug 14, 2012 9:54 pm
Post subject: Digital square Open thread
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Post here all shoots what you like and made with lens what is vignetting on your camera and have to crop it square to remove vignetting part. Nice to have basic info , camera , lens and your personal note.

Waltz Telephoto 1 1/2" F1.9 D mount on Sony NEX-3

I love it sharp, super small , great toy Smile

#1

#2


Last edited by Attila on Wed Aug 15, 2012 5:44 pm; edited 1 time in total


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Posted: Tue Aug 14, 2012 9:59 pm
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Posted: Tue Aug 14, 2012 9:59 pm
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Carl Zeiss Jena Tevidon 16mm C mount on Sony NEX

Fun to play with it, super small , pretty good.

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Posted: Wed Aug 15, 2012 9:30 pm
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Posted: Wed Aug 15, 2012 9:30 pm
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Sigma 4.5mm f2.8 FE HSM


Last edited by hoanpham on Wed Aug 29, 2012 11:12 pm; edited 1 time in total


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Posted: Wed Aug 15, 2012 9:36 pm
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Posted: Wed Aug 15, 2012 9:36 pm
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4.5 mm ? what kind of lens is it ? mount ?


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Posted: Wed Aug 15, 2012 9:50 pm
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Posted: Wed Aug 15, 2012 9:50 pm
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It's a sigma 4.5mm f2.8 circular FE auto focus with HSM, my copy is in pentax K mount.
Anything beyond 40cm is tack sharp.
It's also 'almost' impossible to bring out the bokeh.
Still Sigma add an HSM motor in it

No other PP than crop to square.
Sharp even at f2.8.

Last edited by hoanpham on Wed Aug 15, 2012 9:53 pm; edited 1 time in total


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Posted: Wed Aug 15, 2012 9:52 pm
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Posted: Wed Aug 15, 2012 9:52 pm
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Interesting I never heard of it, I think due I had no interest about AF lenses. 4,5 mm sound is pretty weird I thought a CCTV lens Smile


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Posted: Wed Aug 15, 2012 9:58 pm
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Posted: Wed Aug 15, 2012 9:58 pm
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As far as I know, it is the only lens with circular FE on crop sensor.

The other I have is an add-on Kenko adjustable focal and own aperture which I never tried.
According to reviews, the Kenko is sharp at f11, and not so good otherwise.


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Posted: Wed Aug 15, 2012 10:10 pm
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Posted: Wed Aug 15, 2012 10:10 pm
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hoanpham wrote:
As far as I know, it is the only lens with circular FE on crop sensor.

The other I have is an add-on Kenko adjustable focal and own aperture which I never tried.
According to reviews, the Kenko is sharp at f11, and not so good otherwise.


Seems Kenko is pretty week, right.


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Posted: Fri Aug 17, 2012 6:30 pm
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Posted: Fri Aug 17, 2012 6:30 pm
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Excellent topic !

I would love to see some c-mount lens on a Nikon 1 camera if possible, and of course with the OP permission.


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Posted: Wed Aug 29, 2012 8:52 pm
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Posted: Wed Aug 29, 2012 8:52 pm
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Carl Zeiss Jena Tevidon 10mm f2.0 on Sony NEX-3

rest of it here



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Posted: Fri Sep 14, 2012 11:56 pm
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Posted: Fri Sep 14, 2012 11:56 pm
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Hi!

All of these are from a Tamron industrial automation lens, model 23FM25SP: c-mount, 25mm, f1.4, 103g. I made a post specifically about this lens here:

http://forum.mflenses.com/tamron-23fm25sp-t52439.html


All of these shots were made with the Olympus OM-D E-M5 micro 4/3 camera. I used LR4 to convert from Olympus raw ORF format to JPEG.


#1A f8 1/100s ISO500. Colors adjusted, without crop.


#1B f8 1/100s ISO500. Colors adjusted, cropped.


#2A f5.6 1/125s ISO1250. Colors adjusted, without crop.


#2B f5.6 1/125s ISO1250. Colors adjusted, cropped.


#3A f1.4 1/100s ISO500. Straight out of the camera.


#3B f1.4 1/100s ISO500. Colors adjusted, without crop.


#3C f1.4 1/100s ISO500. Colors adjusted, cropped

Cheers!


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Posted: Sat Oct 20, 2012 12:41 pm
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Posted: Sat Oct 20, 2012 12:41 pm
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Thinking out loud here.....

Wouldnt a 1.4x teleconverter remove most of the vignetting issues we see here?


Having said that I have never seen a teleconverter for NEX, perhaps someone should make one


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Posted: Sat Oct 20, 2012 12:44 pm
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Posted: Sat Oct 20, 2012 12:44 pm
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Crop probably simpler I never seen ever TC either for C mount or NEX and most TC ruin IQ.


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Posted: Tue Oct 23, 2012 7:03 pm
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Posted: Tue Oct 23, 2012 7:03 pm
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#1

#2

#3


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Posted: Tue Oct 23, 2012 7:06 pm
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Posted: Tue Oct 23, 2012 7:06 pm
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Tevidon 25mm keeps up the amazing IQ level of the other Tevidons, third shot is fantastic, congrats.


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Posted: Tue Oct 23, 2012 7:17 pm
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Posted: Tue Oct 23, 2012 7:17 pm
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Thank you!


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Posted: Tue Oct 23, 2012 8:51 pm
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Posted: Tue Oct 23, 2012 8:51 pm
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iangreenhalgh1 wrote:
Tevidon 25mm keeps up the amazing IQ level of the other Tevidons, third shot is fantastic, congrats.


+1 on the third shot! However, the second shot is also really nice, showing the individual needles on the evergreen tree.

I have to say that the Tamron seems pretty darn good as well.


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Posted: Tue Nov 27, 2012 1:21 am
Post subject: Pentax Cosmicar 25mm f1.9 on NEX
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Posted: Tue Nov 27, 2012 1:21 am
Post subject: Pentax Cosmicar 25mm f1.9 on NEX
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I already posted these in http://forum.mflenses.com/help-me-id-the-lens-t54697.html, along with some images on m4/3, where the lens does not vignette. To me cropping square feels weird however, I prefer rectangular crops.

The lens has a very recessed front element (like a typical 50mm macro) so that one can saw off front of the lens making it into a tiny pancake.

#1 uncropped.

#2 Crop of the above

#3 uncropped

#4 Crop of the above

#5 uncropped

#6 Slightly cropped, wide open
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