Originally Posted by
xkaes
The angle of view of any 90mm lens will be the same. Whether or not that is the best angle for you is a personal preference. I consider a 90mm closer to a 24mm than a 28mm (in 35mm format). That may or may not be what you want.
The main differences between an f4.5 vs f8 are frequently:
f8 -- smaller, lighter, less expensive, dimmer image on ground glass, smaller front filter diameter, smaller shutter (faster top speed).
The image circles of both might be something to consider as well. If you don't need much movement, there is no need to pay for a wider image circle.
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