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Thread: Is there a way to find reliable coverage of Enlarger Lenses?

  1. #1

    Join Date
    Apr 2012
    Location
    Plymouth, UK
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    676

    Is there a way to find reliable coverage of Enlarger Lenses?

    Since buying my Devere 507 I have been looking for a couple of nice enlarging lenses (at a reasonable price), although it came with a 210mm Componon on close inspection it was a bit cloudy. I have since purchased a Nikkor 135mm f5.6 from a member on here, a 240mm f5.6 Componon (a bit dusty internally and seemingly no way to mount it) from Italy and a really nice condition 180mm f5.6 Componon from France which I got at a great price of $50 delivered.

    I have had a play with them all this evening (needed additional 39mm and 50mm Devere mounts which arrived today) and amazingly they all seem to cover the 5x7 negative, seemingly with little fall off.

    Now to be fair, I did expect the 210mm and 180mm to cover 5x7 okay but I was amazed that the 135mm also seemed to cover the 5x7 well. I checked the corners of the enlargements as best I could with my Omega grain magnifier against the centre of the image and could see little difference between any of the lenses once focused except that there was a little difference between them with all lenses which I put down to my use of a 5x7 negative in a glassless negative holder.

    I am toying with keeping the 135mm Nikkor for my 4x5 negatives and the 180mm Componon for my 5x7 negatives which would ensure that the sweet spots of each would be in use.

    So, back to my question, is there any way to identify the lens coverage of an enlarging lens?

  2. #2
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    13,881

    Re: Is there a way to find reliable coverage of Enlarger Lenses?

    About all you're likely to find in old mfg specs is the recommended format and magnification ratio.
    They won't show coverage since these lenses are used in fixed position. For critical work you will discover you are actually dealing with a fair amt of falloff, which needs to be corrected with ground
    diffusers appropriate to each lens, and that in fact, corner sharpness is also less than ideal. But these
    are older lenses anyway ... so whatever works for you. I won't use 135 even for 4x5 (been there, done
    that), but plenty of people do if they have cramped headroom. I like 180 for 4x5, however, because it
    is more even, though it was more likely originally marketed for 5x7. Just test.

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