50mm f1 lens £25 ... adaptable for Leica use?

[dkCambridgeshire]

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50mm f1 image intensifier lens for sale £25 "Buy it now" on Ebay

 

50mm F1.0 Super-Fast Lens for XX1080 Image Intensifier on eBay, also, Telescopes, Binoculars Telescopes, Photography (end time 22-Nov-08 14:09:04 GMT)

 

According to my calculations if it covers an image circle of 50mm diameter that is 35.3mm square ie almost 36mm square and probably ok for a 24mm x 36mm mounted transparency (allowing for slide mount crop) . Although the vendor states "not suitable for film photography" there might be a way to project the lens onto a film or image sensor plane using a supplementary lens ... or even projecting the image onto a piece of engineer's drafting film and then copying it?? And at just £25 could be worth an experiment.

 

And the way the description is worded they may have more than one for sale.

 

Cheers

 

dunk

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[giordano]

Nice thought - but the seller says that the image plane is "very close" to the rear element of the lens, and that the "rear lens diameter" is 47mm, which is larger than the internal diameter of the M mount. So it seems there's no chance of getting infinity focus.

[dkCambridgeshire]

Nice thought - but the seller says that the image plane is "very close" to the rear element of the lens, and that the "rear lens diameter" is 47mm, which is larger than the internal diameter of the M mount. So it seems there's no chance of getting infinity focus.

 

I can think of a way of using it ... similar to some slide copying set-ups ... but project the image onto a screen in lieu of the slide ... with the f1 lens mounted on bellows with a racking focusing mechanism ... and then copy the screen image with the camera ... ok it would be a bit Heath Robinson but it could result in an image with an f1 DOF and all its creative possibilities ... and for £25 might be worth a try.

 

Cheers

 

dunk

[giordano]

I can think of a way of using it ... similar to some slide copying set-ups ... but project the image onto a screen in lieu of the slide ... with the f1 lens mounted on bellows with a racking focusing mechanism ... and then copy the screen image with the camera ... ok it would be a bit Heath Robinson but it could result in an image with an f1 DOF and all its creative possibilities ... and for £25 might be worth a try.

 

I guess so - though I don't see how you could maintain reasonable image quality that way: ISTM that the texture of the screen would spoil things. I wonder what the image quality of the lens is?

[dkCambridgeshire]

I guess so - though I don't see how you could maintain reasonable image quality that way: ISTM that the texture of the screen would spoil things. I wonder what the image quality of the lens is?

 

Screen texture would not matter for a creative composition in fact it could enhance the image ... and the out of focus parts would still be there. I have seen many creative/abstract images made by projecting original slides onto drafting film and glass smeared with margarine. An original image made with the f1 lens and similarly projected has creative possibilities. Sharpness is not essential and the potential shallow depth of field is appealing.

I have known two people who gained RPS distinctions using this method ... but of course they had to have a good idea of the image themes in their heads first.

 

Cheers

 

dunk

[farnz]

Interesting, Dunk, please let us know how you get on with your "Notalux".

 

Pete.