Hello.
How would a Rapid Rectilinear design compare to this Cooke Triplet?
I'm planning to build a very simple compact long focus RR. I don't have lenses longer than 300mm. I'm wondering how would be to order two identical achromatic doublets and put it on both sides of a copal #3. This size is for focusing aid (and because I have this shutter available at home).
The barrel would be easier to prepare and fewer degree of freedom mean less possibilities of go wrong.
How would a lens like that perform at f/22 to f/45?
Mi thoughts begin with two of this doublets (D54 f786):
https://a.aliexpress.com/_uj4p5X
Any thoughts?
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I forgot to ask...
How would this diy lens compare with my symmar 210mm converted to 370mm?
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