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**WPRESTO** · 10-03-2011, 12:46 PM

Dear Pentaxians:

OOPS! Correction. The Kowa lens with 500mm adapter attached comes in at 4.34 lb, almost exactly the same weight as a 50-500mm Bigma. The 500mm f4.5 Sigma is 6.82 lb. = better than a kilogram more. The two 500mm lenses are both are about 3.5 inches longer than a Bigma collapsed to 50mm.The Kowa comes with what appears to be a very long dovetail mount on the rotating tripod mount, which probably adds some ounces to the weight just as a long Arca Swiss plate would add a few ounces to either Sigma.

WPRESTO

RonHendriks1966 · 10-03-2011, 02:04 PM

Isn't a Pentax scope attached to your camera just the same?

atlnq9 · 10-03-2011, 06:57 PM

Originally posted by RonHendriks1966

Isn't a Pentax scope attached to your camera just the same?

Yeah as I mentioned earlier making scope and telescope adapters is nothing new, but most of these people don't like facts and took what I was saying as bashing the OP.

But this is a bit fancier, it includes the teleconverters built into three different scope adapters

Nothing different than dedicated teleconverters like the Pentax 1.4x L and 2x L...

atlnq9 · 10-03-2011, 07:10 PM

Originally posted by WPRESTO

The Kowa lens with 500mm adapter attached comes in at 4.34 lb, almost exactly the same weight as a 50-500mm Bigma. The 500mm f4.5 Sigma is 6.82 lb. = better than a kilogram more.

As one would expect the 500 4.5 is faster so therefore bigger glass. If you want slower, aren't concerned with taking a gamble on IQ, want lighter, don't need the AF, and have ruled out the many quality MF 300 2.8s for very reasonable prices then consider this lens.

I am always considering bigger glass. Analyzing the facts; the benefits of the lens don't offset the high price and advantages of the other options out there for me.

TOUGEFC · 10-04-2011, 01:03 AM

Originally posted by atlnq9

Buy one of A*300 2.8s in the market place which are selling for nothing and get a TC..

Can you please link me too these A*300 f/2.8 you speak of that "are selling for nothing".

Everytime i see them they are around $2000+

crf529 · 10-04-2011, 03:13 AM

Uuuuuuuuuuuu....both under 2k. Wasn't hard?

https://www.pentaxforums.com/forums/photographic-equipment-sale/148885-sale-p...worldwide.html

https://www.pentaxforums.com/forums/photographic-equipment-sale/159921-sale-s...0mm-ed-if.html

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10-03-2011, 12:46 PM	#16
WPRESTO Loyal Site Supporter Join Date: Aug 2010 Location: Massachusetts Photos: Gallery \| Albums Posts: 59,144 Original Poster	Dear Pentaxians: OOPS! Correction. The Kowa lens with 500mm adapter attached comes in at 4.34 lb, almost exactly the same weight as a 50-500mm Bigma. The 500mm f4.5 Sigma is 6.82 lb. = better than a kilogram more. The two 500mm lenses are both are about 3.5 inches longer than a Bigma collapsed to 50mm.The Kowa comes with what appears to be a very long dovetail mount on the rotating tripod mount, which probably adds some ounces to the weight just as a long Arca Swiss plate would add a few ounces to either Sigma. WPRESTO

10-03-2011, 02:04 PM	#17
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	Isn't a Pentax scope attached to your camera just the same?

10-03-2011, 06:57 PM	#18
atlnq9 Veteran Member Join Date: Mar 2011 Location: Arizona Photos: Albums Posts: 330	Originally posted by RonHendriks1966 Isn't a Pentax scope attached to your camera just the same? Yeah as I mentioned earlier making scope and telescope adapters is nothing new, but most of these people don't like facts and took what I was saying as bashing the OP. But this is a bit fancier, it includes the teleconverters built into three different scope adapters Nothing different than dedicated teleconverters like the Pentax 1.4x L and 2x L...

10-03-2011, 07:10 PM	#19
atlnq9 Veteran Member Join Date: Mar 2011 Location: Arizona Photos: Albums Posts: 330	Originally posted by WPRESTO The Kowa lens with 500mm adapter attached comes in at 4.34 lb, almost exactly the same weight as a 50-500mm Bigma. The 500mm f4.5 Sigma is 6.82 lb. = better than a kilogram more. As one would expect the 500 4.5 is faster so therefore bigger glass. If you want slower, aren't concerned with taking a gamble on IQ, want lighter, don't need the AF, and have ruled out the many quality MF 300 2.8s for very reasonable prices then consider this lens. I am always considering bigger glass. Analyzing the facts; the benefits of the lens don't offset the high price and advantages of the other options out there for me.

10-04-2011, 01:03 AM	#20
TOUGEFC Veteran Member Join Date: Nov 2009 Location: Brisbane Photos: Gallery Posts: 3,561	Originally posted by atlnq9 Buy one of A300 2.8s in the market place which are selling for nothing and get a TC.. Can you please link me too these A300 f/2.8 you speak of that "are selling for nothing". Everytime i see them they are around $2000+

10-04-2011, 03:13 AM	#21
crf529 Senior Member Join Date: Mar 2011 Location: Australia Posts: 124	Uuuuuuuuuuuu....both under 2k. Wasn't hard? https://www.pentaxforums.com/forums/photographic-equipment-sale/148885-sale-p...worldwide.html https://www.pentaxforums.com/forums/photographic-equipment-sale/159921-sale-s...0mm-ed-if.html

New 500 f5.6 in Pentax mount

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