[LRflex] Re: PS RE: Angle of View

Tom.. the Angle of view is determined by the sensor format and the FL of the
lens, only.  ( Lens Vignetting is a totally other issue, and further may
limit the useable AOV given a specific format.).
Image Circle is totally lens dependent.  It is the circle of light (
actually a cone, but who is quibbling...) thrown by a lens onto a target
without regard to sensor size.  It is dependent on lens design.

All 50mm lenses have the same angle of view FOR THE SAME SENSOR.  Different
Sensor = different AOV.  But they each may have a different Image Circle.

Or I misunderstood your point....

Frank Filippone
red735i@xxxxxxxxxxxxx


And don't forget formats bigger than 35mm. ;-)  The LF
potographers on the list would also point out that
focal length and angle of view are not the same -- two
lenses with the same focal length but differing angles
of view will have different circles of coverage; i.e.
able to cover different formats or allow more or less
shift movements.  All 50mm lenses do not have the same
angle of view.  E.g. a 50mm f.l. designed for medium
format has a wider angle of view than a 50mm f.l. made
for 35mm. 

Tom Schofield



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