My new Industar 61L/D

Johnmcd

Johnmcd

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Relubed and on the camera. Tested it today against my Nokton 40mm. Nowhere near the quality of manufacture or operation of focus etc. but the images compare well. At least of my old boot :)

Images have been resized and given same amount of unsharp mask.

Focus point is zip handle.

I61 @ 2.8 wide open - 200 iso


p68961609.jpg


Nokton 40 @ 2.8 - 200 iso

p265367287.jpg


Cheers,

John
 
Hi John,

I like this kind of comparison. Gut impression prefers the Nokton image, but the Industar isn't far behind. The nokton image seems a little more 3 dimensional somehow. Anyway thanks for the comparo. and you might want to think about new boots!

Steve
 
As Matt said, the only real noticeable difference is that the I-61 has a little bit lesser contrast. At web-resolution sharpness comparisons are pretty moot.
 
I use one on my Nikon RFs, the optics module can be screwed into a mount of a J-8 for a Kiev. I adjusted it to focus properly with the Nikon. It is very sharp.

The focal length is slightly longer than the Leica standard; meaning the focus is usually slightly behind what the RF indicates on your camera. This can be compensated for by thickening the shim.
 
Last edited:
radiocemetery said:
Hi John,

I like this kind of comparison. Gut impression prefers the Nokton image, but the Industar isn't far behind. The nokton image seems a little more 3 dimensional somehow. Anyway thanks for the comparo. and you might want to think about new boots!

Steve
Click to expand...

New boots? Never :) Once I finish fighting fires with them they become the comfy lawn mowing boots.

There are some differences. Maybe the 3D feel comes from 40 vs 50mm after a little cropping?

Cheers,

John
 
erikhaugsby said:
As Matt said, the only real noticeable difference is that the I-61 has a little bit lesser contrast. At web-resolution sharpness comparisons are pretty moot.
Click to expand...

I first tried to do a 100%, no sharpen comparison that still looked ok within the 900 pixel limit. But it didn't seem to give the overall impression of the lens that this does.

I do feel that web-resolution sharpness does have its place as long as both images are resized and sharpened exactly the same. In other words if one image is softer than the other before, it will still be after the changes as long as the sharpening is not over done.

In this case the main variables are,

1. My focussing
2. A change in light between lens changes causing the camera AE to adjust shutter speed (maybe I should have shot manual?)
3. Slightly different resolutions after crop but before resize due to 40 vs 50 view

Cheers,

John
 
Brian Sweeney said:
I use one on my Nikon RFs, the optics module can be screwed into a mount of a J-8 for a Kiev. I adjusted it to focus properly with the Nikon. It is very sharp.

The focal length is slightly longer than the Leica standard; meaning the focus is usually slightly behind what the RF indicates on your camera. This can be compensated for by thickening the shim.
Click to expand...

Hi Brian,

I would agree with that, especially looking at these images. Assuming my focussing is accurate I would say it backfocusses slightly.

Where does that shim go?

Cheers,

John
 
It's been a several months since I took mine apart. Now it's "Nikon Mount". And the I-61 mount now houses a Zeiss Tessar that is now RF coupled in LTM.

Look through the back of the lens. There is a light baffle that comes out. I think there is a retaining ring under it that holds the optics module in. Ring comes off, module comes out. The shim sits between the optics module and the focus mount. Try thickening it using some copper tape, or even a thicker piece of paper. All you need is ~0.1mm to cut down on the focus error.
 
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