Industar-50-2 Russian

SONYNUT · Post by **SONYNUT** » Mon Aug 08, 2011 5:10 pm

not too bad I'd say.....better than el nikor 50/4 I think.

on bellows.9" out...@ f1:5.6 (lens)

aps-c

yeatzee · Post by **yeatzee** » Mon Aug 08, 2011 5:24 pm

which one?

SONYNUT · Post by **SONYNUT** » Mon Aug 08, 2011 6:04 pm

yeatzee · Post by **yeatzee** » Mon Aug 08, 2011 6:28 pm

Sorry i should have been more specific. Which el nikkor?

Craig Gerard · Post by **Craig Gerard** » Tue Aug 09, 2011 2:10 am

SONYNUT,

The details in your initial post indicate, to my understanding, that you are using an EL-Nikkor 50/4 = 4-element, 3-group design as opposed the EL-Nikkor 50/2.8 = 6-element, 4-group design.

Reference:
http://en.wikipedia.org/wiki/Nikkor#EL-Nikkor

Do you have a copy of the EL-Nikkor 50/2.8 to compare with the Industar 50-2 3.5/50 and a reverse-mounted EL-Nikkor 50/4?

Reverse mounting and reducing the extension may bring the EL-Nikkor to within its optimal range and result in a more complimentary outcome.

It would be good to compare notes. I have an Industar 50-2 3.5/50 and an EL-Nikkor 50/2.8, so I will take some images and upload the results.

Craig

SONYNUT · Post by **SONYNUT** » Tue Aug 09, 2011 11:49 am

I don't have a 2.8..

canonian · Post by **canonian** » Tue Aug 09, 2011 3:10 pm

Craig Gerard wrote:...so I will take some images and upload the results.

The results from Sonynut are looking promising and I'm curious for the results of the comparison done by Craig.

I wonder if there are 50mm's that can outperform the El-Nikkors, given its price.
By the end of the week I receive both a Rodenstock Rodagon 50/2.8 and a Schneider Kreuznach Componon-S 50/2.8 and heard/hope they are slightly better than the El-Nikkors.
Anyone had any experience with these?

enricosavazzi · Post by **enricosavazzi** » Tue Aug 09, 2011 9:54 pm

canonian wrote:
Craig Gerard wrote:...so I will take some images and upload the results.
The results from Sonynut are looking promising and I'm curious for the results of the comparison done by Craig.

I wonder if there are 50mm's that can outperform the El-Nikkors, given its price.
By the end of the week I receive both a Rodenstock Rodagon 50/2.8 and a Schneider Kreuznach Componon-S 50/2.8 and heard/hope they are slightly better than the El-Nikkors.
Anyone had any experience with these?

Not exactly, but look here (near the bottom of the page) for a sample with an Apo Rodagon N 50 mm f/2.8:
http://savazzi.freehostia.com/photograp ... non_60.htm

canonian · Post by **canonian** » Wed Aug 10, 2011 2:16 am

Thank you for this link, Enrico,
Unfortunally none of my mentioned lenses are apochromatically corrected.

The first picture of Sonynut's Industar 50-2 shows good contrast.
Is it coated?

SONYNUT · Post by **SONYNUT** » Wed Aug 10, 2011 4:23 am

It's got a purple look to it so i would say it has some coating

Craig Gerard · Post by **Craig Gerard** » Wed Aug 10, 2011 7:46 pm

Single image......more details, crop and a focus stack to follow. The Industar 50-2 3.5/50 @ f/4 is reverse-mounted.

Image has been resized for the web and mild USM of 40% applied.

................................................................

*Additional Results: Industar 50-2 3.5/50 @ f/4 : Focus Stack. Zerene PMax.

.................................................................

* 100% Crop from focus stack. NR and mild USM applied.

Craig

Craig Gerard · Post by **Craig Gerard** » Wed Aug 10, 2011 11:57 pm

I increased the magnification.

Here are two images for comparison with a EL-Nikkor 50/2.8 @ f/4

Industar 50-2 3.5/50 @ f/4, Single image.

EL-Nikkor 50/2.8 @ f/4, Single image.

.....................................................

100% crops from the images above.

Industar 50-2 3.5/50 (100% crop)

EL-Nikkor 50/2.8 (100% crop)

Craig

canonian · Post by **canonian** » Thu Aug 11, 2011 12:56 am

To my untrained eye: Industar 50-2 looks a bit fuzzy , the El-Nikkor: better contrast and a lot sharper, also in the corners or is it the DOF?.
In Craighs tests the Industar seems no match for the El-Nikkor.
Thank you for these comparisons Sonynut and Graig Gerard.

I often find the El-Nikkor sharpest at F/5.6.
One more question, Craig, can you please add other parameters like type of camera and flash / exposure /shutterspeed, etc, and what specimen you used?
For these comparisons wing scales seems to be the reference.

Craig Gerard · Post by **Craig Gerard** » Thu Aug 11, 2011 1:38 am

Fred wrote:One more question, Craig, can you add other parameters like type of camera and flash / exposure /shutterspeed, etc, and what specimen you used?

Fred, not a problem. Thank you for the prompt

The images I have posted over the course of the day were taken with a Canon 50D, Nikon PB-4 bellows and various adapters for reverse-mounting the lenses. The camera was tethered to a PC.

The images were taken using 'Live View', Silent Shoot enabled Mode 2 selected = EFSC single shot, shutter speed 1/15th, ISO 100.

The EL-Nikkor 2.8/50 is the earlier, Mr Zenji Wakimoto version.

An Olympus BHMJ focus block was used for incremental focal plane adjustments.

A Volpi Fiber Optic illuminator, with three light guides was pointed at a diffuser cylinder made from Rosco diffusion material.

The subject:
Callosamia promethea ♂
Collection data:
Omro, Wisconsin USA 16/6/1973 (dd/mm/yy)

http://en.wikipedia.org/wiki/Callosamia_promethea

Craig

ChrisR · Post by **ChrisR** » Thu Aug 11, 2011 2:20 am

Nice test Craig

. No surprises then.