Slide holding for Scanning - Ohnar and Other Options

Halina3000 wrote:

Thanks.

A couple of options that I already have would be the Minolta MD 50mm lens from my old SLR. I also have the Canon 40mm pancake lens for the DSLR as well as the 18-55mm kit lens. At the moment I have no extension tubes nor an MD to EF adapter but I could buy them if they are going to be useful.

I've now done the maths for these lenses and can get into the ballpark with each of them but I'm not clear whether any of them would be in their 'comfort zone' if used in this way. My initial reading of other posts about digitising slides suggested that enlarger lenses would be a better option but I now gather from the comments received on this thread that it's not as simple as that... so I wonder which camera lenses are well (or badly) suited to the task. Would the 40mm have too much field curvature for example?

Fixed length tubes beg the question of how to frame the slide properly to make best use of the sensor area. The maths calculates the minimum focus distance. I'm assuming (given that these lenses have focus adjustment) that I can pick a magnification that is slightly too high and then move the slide mount further away and refocus the lens to get the correct framing?

I have that 40mm pancake lens as well. It is a good lens for the price and its normal MFD is already 30cm. At least you could try that one + an EF mount extension tube.  You would need at least an EF 21mm auto extension tube as I tried the 13mm one and the image was still smaller than APS. A set of auto tubes is not that expensive.

Met vriendelijke groet, Ernst
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