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PostPosted: Tue Aug 14, 2012 9:54 pm    Post subject: Digital square Open thread Reply with quote

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

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


PostPosted: Tue Aug 14, 2012 9:59 pm    Post subject: Reply with quote

Carl Zeiss Jena Tevidon 16mm C mount on Sony NEX

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

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PostPosted: Wed Aug 15, 2012 9:30 pm    Post subject: Reply with quote

Sigma 4.5mm f2.8 FE HSM


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


PostPosted: Wed Aug 15, 2012 9:36 pm    Post subject: Reply with quote

4.5 mm ? what kind of lens is it ? mount ?


PostPosted: Wed Aug 15, 2012 9:50 pm    Post subject: Reply with quote

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


PostPosted: Wed Aug 15, 2012 9:52 pm    Post subject: Reply with quote

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


PostPosted: Wed Aug 15, 2012 9:58 pm    Post subject: Reply with quote

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.


PostPosted: Wed Aug 15, 2012 10:10 pm    Post subject: Reply with quote

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.


PostPosted: Fri Aug 17, 2012 6:30 pm    Post subject: Reply with quote

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.


PostPosted: Wed Aug 29, 2012 8:52 pm    Post subject: Reply with quote

Carl Zeiss Jena Tevidon 10mm f2.0 on Sony NEX-3

rest of it here



PostPosted: Fri Sep 14, 2012 11:56 pm    Post subject: Reply with quote

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!


PostPosted: Sat Oct 20, 2012 12:41 pm    Post subject: Reply with quote

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


PostPosted: Sat Oct 20, 2012 12:44 pm    Post subject: Reply with quote

Crop probably simpler I never seen ever TC either for C mount or NEX and most TC ruin IQ.


PostPosted: Tue Oct 23, 2012 7:03 pm    Post subject: Reply with quote

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PostPosted: Tue Oct 23, 2012 7:06 pm    Post subject: Reply with quote

Tevidon 25mm keeps up the amazing IQ level of the other Tevidons, third shot is fantastic, congrats.


PostPosted: Tue Oct 23, 2012 7:17 pm    Post subject: Reply with quote

Thank you!


PostPosted: Tue Oct 23, 2012 8:51 pm    Post subject: Reply with quote

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.


PostPosted: Tue Nov 27, 2012 1:21 am    Post subject: Pentax Cosmicar 25mm f1.9 on NEX Reply with quote

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