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Forum: Pentax Lenses Jul 28, 2007, 10:37 PM
Replies: 30
Views: 4,268
Posted By PeterP
Yes that is indeed good to know :!: I...

Yes that is indeed good to know :!:

I apparently wrongly assumed most dslr would have implemented similar cutoff mechanism, and would have not even tried to mix and match :G
Forum: Pentax Lenses Jul 28, 2007, 5:06 PM
Replies: 30
Views: 4,268
Posted By PeterP
Is that 1.7 t-con meant to be used in front of an...

Is that 1.7 t-con meant to be used in front of an existing lens?
Having a hard time imaging how a standard teleconverter meant to go between the lens and camera would work held infront of a lens :?...
Forum: Pentax Lenses Jul 28, 2007, 5:00 PM
Replies: 30
Views: 4,268
Posted By PeterP
Hi Scott, Yes, we are talking the same thing...

Hi Scott,
Yes, we are talking the same thing :-)
Each adjecent aperture value number either halves or doubles the light the sensor and AF system receives from the lens.

So a lens with a max...
Forum: Pentax Lenses Jul 28, 2007, 11:34 AM
Replies: 30
Views: 4,268
Posted By PeterP
Let me jump in here and point out that it is not...

Let me jump in here and point out that it is not the lens itself the TC will or will not work with, but the lens&tc combination will or will not work with a particular body.

A 1.4x TC costs 1 stop...
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