Is there something wrong with my lens?

Discussion in 'Darkroom Equipment' started by olleorama, Feb 23, 2010.

  1. olleorama

    olleorama Member

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    I managed to get full coverage on a 4x5" sheet with my 105/5.6 componon, should that be possible? I thought the practical limit would be 135? This was with my D3 with the variable condensor taken out, as you would do with a 150 mm lens. The focusing image was sharp in my focuscope, and I can't see any issues (e.g. uneven exposure) on the prints.

    Is there any downsides to using a 'too short' enlarging lens?
     
  2. Ian Grant

    Ian Grant Subscriber

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    There's nothing wrong with the lens just you :D It's not designed for that coverage. Yes the downside is it doesn't cover properly corner sharness will be very poor :smile:

    Ian
     
  3. olleorama

    olleorama Member

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    Hmph, guess I'll have to shell out for a cam for the 150 then...
     
  4. Mike1234

    Mike1234 Inactive

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    I've used the 105 Componon on 4x5 in an extreme situation or two many years ago but, as Ian stated, corner distortion and resolution do suffer a bit... it's definitely noticible. A 135mm Nikkor is a knock-out champ though and costs much less on the used market than a top-notch 150mm.
     
  5. CBG

    CBG Member

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    You may find corner illumination to be very low too.
     
  6. Ronald Moravec

    Ronald Moravec Member

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    For small prints the focal length is effectively longer. I would still question corner definition.