Macro lens for Pentax 645D

Clever people,

Having got some very good feedback in this thread I did some thinking after seeing the used price of a 645D, which would be a more long-term investment.

Which of lenses specifically for the medium format would do great for macro photography of vacuum tubes, which is going to be a project for the next couple of years documenting adn archiving for Radiumuseum and Wikipedia.

Something that would work for portraits too would be nice.

Thanks in advance,

Kasper

The technical details for Pentax 645 lenses are here:

https://www.pentaxforums.com/lensreviews/SMC-Pentax-645-Medium-Format-Lenses-i4....

There are three macro lenses available - 90mm D-FA, 120mm FA and 120 A - in the section for telephoto primes.

I only have experience of the 120 A, (with a 645N) so cannot comment on the other two. I have upgraded to a 645D, but haven't used the macro lens on it yet.

I do wonder if the minimum focussing distance of of 40cm might be a problem for your proposed application?

Hope that's useful.

Thank you for the reply and the sum up of lenses. The 90mm is a beauty!

But I think the minimum focus distance will be a problem for this project. I'll try and see if I can borrow one or demo one before buying. But my current thought it that it would be better to stick to full-frame.

What are your impressions of the 645D?