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EPL1 and Industar 61 L/D 53mm F2.8 RF lens, a brief test
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PostPosted: Sun Mar 13, 2011 10:36 pm    Post subject: EPL1 and Industar 61 L/D 53mm F2.8 RF lens, a brief test Reply with quote

This test is a companion to my Jupiter-8 test, done in the same way at the same time.

The Industar is easier to use having non-interactive focus and aperture rings and click-stops on the aperture ring. Due to the crude mechanical design, there is a fraction of a mm of radial play of the lens in the mount and this results in a slight lateral movement of the image when the focus is adjusted. The lens does look very smart on the EPL1 (especially without the hood).



Overall, I would rather use the Industar than the Jupiter due to the better ergonomics.

Central Resolution

At f2.8, the central resolution is probably a touch worse than the Jupiter-8 at f2.8, but there is very little in it. The resolution improves a little at f4 and then stays fairly constant until diffraction kicks in at f16. I sense the Jupiter is just a bit better throughout the range but the difference would probably not be noticed in reality.

Any colour fringing is well suppressed. Contrast at a given aperture is similar to the Jupiter.

Below is the full picture of my test target at f2.8. The targer is 2.5 m from the camera.



Crops at f2.8 to f16 are below









Bokeh Test
Pictures are at f2.8, f4, f5.6 and f8 respectively. Wide open bokeh is similar to the jupiter wide open.






PostPosted: Tue Mar 15, 2011 10:50 pm    Post subject: Reply with quote

Hi Mark.
Just noticed this topic.
Interesting tests. I have the Industar 61 L/Z and like your L/D it's a little bit soft at f:2.8 and much sharper when closed. Best from 5.6 to 11.


PostPosted: Tue Mar 29, 2011 3:30 am    Post subject: Reply with quote

Thanks again!

Have you tried focussing rapidly off camera, a hundred times or so, to loosen the grease a little?

There are various styles of this lens, most with more silver metal. They seem to be more common than the M42 version and Industar more so than the Jupiter.

Keep it up!


PostPosted: Sat Jan 28, 2012 9:37 am    Post subject: Reply with quote

Thanks for the great review Mark. Ive just picked up one of the these to use on my Nex-5n, I hope is performance is as good and you have shown here!


PostPosted: Sat Jan 28, 2012 11:55 am    Post subject: Reply with quote

johnboy wrote:
Thanks for the great review Mark. Ive just picked up one of the these to use on my Nex-5n, I hope is performance is as good and you have shown here!


Thanks for the kind words. I hope you enjoy using the lens.

Mark