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Forum: Pentax Lenses Jul 28, 2007, 9:45 PM
Replies: 30
Views: 4,267
Posted By snostorm
PeterP wrote: Hi Peter, AFAIK, and in my...

PeterP wrote: Hi Peter,

AFAIK, and in my experience, this hardware/firmware cutoff doesn't happen with Pentax DSLRs, and in most cases, the TCs just pass the aperture values sent by the lens...
Forum: Pentax Lenses Jul 28, 2007, 9:24 PM
Replies: 30
Views: 4,267
Posted By snostorm
Hi dwssas, The Oly Tcon 17 will work on your...

Hi dwssas,

The Oly Tcon 17 will work on your lens, but you have to watch it if your front lens element rotates when it focuses. If this is the case, you might overstress your focusing motor with...
Forum: Pentax Lenses Jul 28, 2007, 1:00 PM
Replies: 30
Views: 4,267
Posted By snostorm
PeterP wrote: Hi Peter, I don't think...

PeterP wrote:
Hi Peter,

I don't think that it's a matter of the aperture value (f stop number), but the amount of light the AF sensor receives that determines whether the AF system can work...
Forum: Pentax Lenses Jul 28, 2007, 5:19 AM
Replies: 30
Views: 4,267
Posted By snostorm
dwssas wrote: Hi dwssas, The manufactures...

dwssas wrote:
Hi dwssas,

The manufactures state a general working aperture for their TCs which is usually slower than what they actually will work with, depending on the lens in question. They...
Forum: Pentax Lenses Jul 24, 2007, 11:50 PM
Replies: 30
Views: 4,267
Posted By snostorm
robar wrote: Hi Roy, Never thought to...

robar wrote:
Hi Roy,

Never thought to look in the character map -- good idea, makes ยข :-)

Scott
Forum: Pentax Lenses Jul 24, 2007, 9:18 PM
Replies: 30
Views: 4,267
Posted By snostorm
Hi dwssas, I usually hate this kind of post...

Hi dwssas,

I usually hate this kind of post (mine, not yours!) but here goes.

I don't know the answer to your question, but my guess is that it won't -- The Sigma TCs have a protruding front...
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