Quote Originally Posted by StoneNYC View Post
David, your post is a little jumbled.

You can always use a longer FL lens provided you have the enlarger height available. But in general...

50mm-65mm for 35mm
75mm-105mm for 120 (6x7, 6x6, 645)
135mm-150mm 4x5
210mm 5x7
240mm-300mm 8x10

Does that help?

An 80mm will work for 6x7 and 6x6 you don't really need to switch between the 105 and 80mm you can just use one 80mm for all your medium format work.

As far as condenser placement, again in general (usually) the lower placement (closer to lens) is the smaller format and the higher placement of the condenser is for larger formats.

You also need the correct condenser set for each focal length although there,s usually enough leeaway as long as the bulb positioning is adjustable.

Ian