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apo symmar as macro
I have used a 240mm G-claron for landscape shots. It works fine at infinity. The rule is to stop down to f22 (or at least to f16 says Wisner) for use at infinity. The old time great photographers (Adams included) used lenses of the G-claron type (Dagors) all the time at or near infinity. The G-claron are coated, but not multi-coated. I think a G-claron is great choice as a double-duty lens for you. An apo symmar may not be a good choice for macro, but a G-claron is an excellent choice for macro (it is optimized for 1:1) and is great at infinity too. Small size, low price used, and light weight are other benefits. You may want to consider a Fujinon 240mm A. Is comes in a Copal #0 shutter, it is multi-coated, and it is optimized for about 1:5 (I think). I have replaced my 240mm G-claron for the Fujinon because the Fujinon is smaller, lighter, multi-coated, and has even greater coverage than the G-claron (an issue with 8x10).