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dbuffington · 01-07-2009, 12:15 PM

Hi Folks!

Anyone care to suggest a teleconverter for the Pentax A* 300mm f4?

Thanks!
Dave

P.S. I tried the Pentax 2X-L but the extension collides with the rear lens element.

slomojoe · 01-07-2009, 12:28 PM

The 2X-s would probably work. They show up on ebay once in a while. Not sure about the Sigma EX APO, I hear those are kind of finnicky.

newarts · 01-07-2009, 12:50 PM

The Kenko PZ-AF AF 1.5X SHQ adapter has no extensions or protrousions to interfere with anything. It works with Autofocus lenses as well as with K & M lenses.

**Tyama** · 01-07-2009, 01:18 PM

I have the A* 300mm and a 1.4X-S rear converter and have used it for taking pics of surfers here. I use the focus trap method and it works pretty well, but in lower light it will struggle more to achieve focus. IQ is pretty good with this combo and pics can be cropped.

I had the 2X-S and used it with the A* 300mm and found it didn't work as well, focussing was a little harder and IQ wasn't better than cropping the pic using the 1.4X-S.

borno · 01-07-2009, 04:44 PM

You need a smc f1.7x afa, you will be at 510mm f6.7 and it will autofocus (after rough manual focus).

**Lowell Goudge** · 01-07-2009, 06:20 PM

I have the K3000F4 and use it with the 1.7x AF TC. Images are excellent, and as borno commented you get AF after a rough manual focus.

You could also check the sigma 1.4x TC for interference. It might not be a problem depending on the rear design f the A300. I know it does work with some pentax long tele's but forget which ones.

netuser · 01-14-2009, 03:00 PM

Originally posted by borno

You need a smc f1.7x afa, you will be at 510mm f6.7 and it will autofocus (after rough manual focus).

There is one available on ebay now, 30m to end

dbuffington · 01-14-2009, 03:08 PM

Originally posted by netuser

There is one available on ebay now, 30m to end

Thanks! I was actually able to pick one up yesterday, and in very early testing, it seems to work very well with the A*.

Thanks again to all!
Dave

**Lowell Goudge** · 01-14-2009, 06:16 PM

Originally posted by dbuffington

Hi Folks!

Anyone care to suggest a teleconverter for the Pentax A* 300mm f4?

Thanks!
Dave

P.S. I tried the Pentax 2X-L but the extension collides with the rear lens element.

get an SMC - F 1.7x AF TC it will work great on this lens

Rykoh · 01-14-2009, 10:05 PM

Originally posted by Lowell Goudge

get an SMC - F 1.7x AF TC it will work great on this lens

I have to agree. While I think by itself the A* 300mm lens is pretty good, I like it even better combined with the F-1.7x. They seem to compliment one another very well, and the converter helps with my single biggest complaint with the A* 300 - the 4m minimum focus distance. With the combination, you basically get a lightweight ~500mm f/6.7 lens, capable of focusing down to around 3.2m, which is not much bigger than a FA* or DA* 200mm lens (though obviously much slower).

Vylen · 01-14-2009, 10:38 PM

OT: has anyone tried doubling up on TC's? does the camera blow up as a result? heh

01-07-2009, 12:15 PM	#1
dbuffington Junior Member Join Date: Feb 2008 Posts: 44	*Converter for A 300mm f4?** Hi Folks! Anyone care to suggest a teleconverter for the Pentax A* 300mm f4? Thanks! Dave P.S. I tried the Pentax 2X-L but the extension collides with the rear lens element.

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01-07-2009, 12:28 PM	#2
slomojoe Veteran Member Join Date: Mar 2007 Location: Upstate NY Posts: 788	The 2X-s would probably work. They show up on ebay once in a while. Not sure about the Sigma EX APO, I hear those are kind of finnicky.

01-07-2009, 12:50 PM	#3
newarts Inactive Account Join Date: Dec 2008 Location: Ames, Iowa, USA Photos: Albums Posts: 2,965	The Kenko PZ-AF AF 1.5X SHQ adapter has no extensions or protrousions to interfere with anything. It works with Autofocus lenses as well as with K & M lenses.

01-07-2009, 01:18 PM	#4
Tyama Site Supporter Join Date: Mar 2007 Location: Honolulu, Hawaii Photos: Gallery Posts: 92	I have the A* 300mm and a 1.4X-S rear converter and have used it for taking pics of surfers here. I use the focus trap method and it works pretty well, but in lower light it will struggle more to achieve focus. IQ is pretty good with this combo and pics can be cropped. I had the 2X-S and used it with the A* 300mm and found it didn't work as well, focussing was a little harder and IQ wasn't better than cropping the pic using the 1.4X-S.

01-07-2009, 04:44 PM	#5
borno Veteran Member Join Date: Nov 2006 Location: md-usa Photos: Gallery \| Albums Posts: 2,580	You need a smc f1.7x afa, you will be at 510mm f6.7 and it will autofocus (after rough manual focus).

01-07-2009, 06:20 PM	#6
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,892	I have the K3000F4 and use it with the 1.7x AF TC. Images are excellent, and as borno commented you get AF after a rough manual focus. You could also check the sigma 1.4x TC for interference. It might not be a problem depending on the rear design f the A300. I know it does work with some pentax long tele's but forget which ones.

01-14-2009, 03:00 PM	#7
netuser Veteran Member Join Date: Oct 2008 Location: Azores Islands, Portugal Photos: Gallery Posts: 2,236	Originally posted by borno You need a smc f1.7x afa, you will be at 510mm f6.7 and it will autofocus (after rough manual focus). There is one available on ebay now, 30m to end

01-14-2009, 03:08 PM	#8
dbuffington Junior Member Join Date: Feb 2008 Posts: 44 Original Poster	Originally posted by netuser There is one available on ebay now, 30m to end Thanks! I was actually able to pick one up yesterday, and in very early testing, it seems to work very well with the A*. Thanks again to all! Dave

01-14-2009, 06:16 PM	#9
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,892	Originally posted by dbuffington Hi Folks! Anyone care to suggest a teleconverter for the Pentax A* 300mm f4? Thanks! Dave P.S. I tried the Pentax 2X-L but the extension collides with the rear lens element. get an SMC - F 1.7x AF TC it will work great on this lens

01-14-2009, 10:05 PM	#10
Rykoh Veteran Member Join Date: Aug 2007 Location: Oregon, USA Posts: 318	Originally posted by Lowell Goudge get an SMC - F 1.7x AF TC it will work great on this lens I have to agree. While I think by itself the A* 300mm lens is pretty good, I like it even better combined with the F-1.7x. They seem to compliment one another very well, and the converter helps with my single biggest complaint with the A* 300 - the 4m minimum focus distance. With the combination, you basically get a lightweight ~500mm f/6.7 lens, capable of focusing down to around 3.2m, which is not much bigger than a FA* or DA* 200mm lens (though obviously much slower).

01-14-2009, 10:38 PM	#11
Vylen Veteran Member Join Date: Dec 2008 Location: Sydney, Australia Photos: Gallery Posts: 1,262	OT: has anyone tried doubling up on TC's? does the camera blow up as a result? heh

Converter for A* 300mm f4?

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