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Hello - Lens help needed

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Stealth_303

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Hello,

I have an 1100D(Rebel T3), I've done alright with the kit lens and so bought a 50mm Zeiss Jena (wooohoo)

I love the Jena lens, it's great, it came converted already and just slots on and works no problem.

Since then
I bought a :

INDUSTAR-69 2.8/28 Russian Wide Angle Pancake Lens M39 MMZ-LOMO 7

And a

Industar-61 M39 Leica Soviet lens

Both of these lenses are M39, so I bought a couple of mounts to go from M39 to 1100D(Rebel T3)

The mounts came today, and straight away I found that both lenses will not focus at all unless they are held 3 inches away from a subject.

Please can someone tell me what I am doing wrong.

Thank you

Best regards

Merlin
 
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balami

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Stealth_303

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rebel06

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May be its one of those things that you have to put down to experience ... we all get things wrong sometimes .... .BUT .. .good has come out of it .. .you have found the best, friendliest and most helpful photography forum anywhere in the universe .... so please stay around, I think you will like it here.
 

tenchy

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my guess is they are designed to work with a much close distance to the film/sensor, and the mount etc is acting like an extension tube.
 

Stealth_303

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my guess is they are designed to work with a much close distance to the film/sensor, and the mount etc is acting like an extension tube.
Hello yes I think that is the issue... sadly.
 

rebel06

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Stealth_303

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Well said Rebel
 

MikeB

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To use these lenses, you need to find a lens adapter that has a corrective lens in order to maintain infinity focus.

Flange focal distance for EOS cameras is 44mm. That's the distance between the rear of the lens flange and the sensor.

To adapt a non-EF lens to EOS, and retain infinity focus, you need a lens having a flange focal distance greater than 44mm plus the thickness of the adapter. This is why Nikon's manual focus lenses can be easily adapted to Canon cameras.

The flange focal distance for the Leica M39 (L39 or M39×26tpi) mount is only 28.8mm. For this lens to work properly (focus to infinity) on a Canon EOS camera the rear flange needs to be 28.8mm from the sensor - inside the camera body. Or, use an adapter that contains a corrective lens. The problem with corrective lenses is that they usually reduce image quality.

These lenses can be adapted to mirrorless cameras fairly easily, so there is a market for them, especially with videographers.
 

caveman

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Plus the fact you have a 50mm Jena,now i used these on my old Praktica a great little camera
I shall look out for one for my 1200 d,thanks.
 
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