Most likely the light path is set up for the smaller negatives. Can you show us a photo of the enlarger? I am not familiar with any of the Testrite products.
Testrite offered a number of different upgrades for their various enlargers including condenser lenses; this model was a 4x5 max. diffusion enlarger, from what I can find on the internet, so if it is in diffusion mode, there should be no problem to cover 6x6 cm. However, if condensers were added, perhaps those are not sufficient to cover the 6x6 area.
You will need a different condenser - the one in there is designed to focus the light on to a smaller area.Condenser would be that big glass lens directly under the bulb? I don't have a diffuser for this model. Can I make one out of, dunno wax paper?
You will need a different condenser - the one in there is designed to focus the light on to a smaller area.
You might be able to replace the condenser with a disk of diffusing material of some sort.
You will need a different condenser - the one in there is designed to focus the light on to a smaller area.
You might be able to replace the condenser with a disk of diffusing material of some sort.
Sounds like you are making progress.
Condenser lenses are often used in sets. And you can often change the result by adding, removing, reversing or even moving condensers in their housing.
Show us a series of pictures with both lenses in the housing, one lens in the housing and no lenses in the housing.
Also show us what you have put together in the way of a negative carrier - I don't understand your reference to a 6x6 just fits.
The bottom lens is probably intended for 35mm, and should come out for larger negatives.
And I would guess that there is supposed to be a collar between the two gold rings, in order to provide some distance between the condensers and the negative.
You might be able to use negative holders designed for Omega D or Beseler 4x5 enlargers - please show us how you are inserting your holders, and give us the dimensions of that housing - diameter in particular.
The bottom lens is probably intended for 35mm, and should come out for larger negatives.
And I would guess that there is supposed to be a collar between the two gold rings, in order to provide some distance between the condensers and the negative.
You might be able to use negative holders designed for Omega D or Beseler 4x5 enlargers - please show us how you are inserting your holders, and give us the dimensions of that housing - diameter in particular.
Are you sure - it looks more like 11-12 cm (given that a 135 negative is about 3 1/2 cm long?The 35mm carrier is 7cm across.
Are you sure - it looks more like 11-12 cm (given that a 135 negative is about 3 1/2 cm long?
Does the black disk that the lower condenser sits on top of come out? Possibly by unscrewing it out.
If so, I think that and the two condenser lenses together are designed for 35mm, and there are/were different sets of condensers or light diffusers for larger formats.
For discussion/illustration purposes only, here is a link to a listing for a 6x6 carrier for a Beseler 23C enlarger: https://www.bhphotovideo.com/c/prod...FhiBOOHIXUK3iAn9FgvWEmnoSRPPLADkbkaAgqV8P8HAQ
And here is a listing for a 6x6 carrier for a Beseler 45 enlarger: http://store.khbphotografix.com/6x6-Negative-Carrier-for-Beseler-4x5-Enlargers-Used.html
A used (and cheaper) one of these might work in your enlarger. And if you were an APUG subscriber (hint, hint) you could post a want-to-buy classified.
Finally, what results do you get if you just take out the black disk with condensers?
What does it look like in the chrome piece up above the condensers - where the bulb is?Results are good without the glass. Very sharp but obviously I would need a diffuser of some kind. A nice 17cm round cut of frosted glass or Plexiglas would do the job. I would need that also to prevent the negative from melting.
What does it look like in the chrome piece up above the condensers - where the bulb is?
That may be where you might want to put the diffuser.
If you take out the disk, does it evenly illuminate the negatives. It may be that you don't need any diffuser.
You won't melt a negative with a PH212 bulb, although the negative might "pop" a bit.
I have a Fotolarger 100DC that I use for 135. I assumed it would be good for 6x6 too as long as I got a lens. I picked up a 75mm lens but I'm still not getting the full 6x6 projection. I'm relatively new to the darkroom. What else would I need to make this enlarger possible (if at all?) for 6x6? I made my own negative carrier as I'm not sure what kind to get for this ancient machine.
Thanks.
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