Kenko Teleconverters and SDM

channeler · 04-24-2008, 10:58 AM

Just took delivery of a DA*300 today and did a quick test with the Kenko TCs that I have. The Teleplus 1.5x works with the SDM. It seems to take a little longer to AF but that is probably due to loss of 1 stop. The 2x won't give SDM, though the contacts seem to be there. It's probably because of insufficient light with a F4 starting point though I had hoped that I was going to get away with it. So I have to use it on manual focus. Upside is that I can key in 600mm for shake reduction. The 2x is an older lens but it is DG. Don't know if the newer ones would be different. Probably not as it is likely to be insufficient light that is the issue.

Paul

Buddha Jones · 04-24-2008, 02:22 PM

Really, I thought this was proven not to work... and where did you get your DA*300 from?

channeler · 04-24-2008, 02:59 PM

Well the 1.5x definitely works for me Jay, but as I said, sometimes there is a little hunting and a small delay in the AF locking on the target. I have the DG version which I purchased only a few months back. I did have the DA 300 ordered from a German company but they couldn't give me any idea of a delivery date so I bought one from Prodigital 2000 in the end. I will compare the contacts of the 1.5x and 2x TCs in more detail and post some shots taken with the DA 300 when I have a bit more time.

Paul

Fototim · 04-24-2008, 03:46 PM

Let me fill in that the Pentax F-1,7x works very well with this lens. AF is fast, but off cource noisy.
Optical performanse is pretty good too, you just need to step down a bit. Wide open, it is a bit too soft for my liking.

MaritimTim

John Kovarik · 04-24-2008, 04:03 PM

That mirrors my findings too (I don't have the Kenko 2x). I also bought my DA* 300 from prodigital2000, and a 35/2.8 macro at the same time............good folks.

04-24-2008, 10:58 AM	#1
channeler Veteran Member Join Date: Jun 2007 Location: Northwich Cheshire England Photos: Gallery Posts: 1,009	Kenko Teleconverters and SDM Just took delivery of a DA*300 today and did a quick test with the Kenko TCs that I have. The Teleplus 1.5x works with the SDM. It seems to take a little longer to AF but that is probably due to loss of 1 stop. The 2x won't give SDM, though the contacts seem to be there. It's probably because of insufficient light with a F4 starting point though I had hoped that I was going to get away with it. So I have to use it on manual focus. Upside is that I can key in 600mm for shake reduction. The 2x is an older lens but it is DG. Don't know if the newer ones would be different. Probably not as it is likely to be insufficient light that is the issue. Paul

04-24-2008, 02:59 PM	#3
channeler Veteran Member Join Date: Jun 2007 Location: Northwich Cheshire England Photos: Gallery Posts: 1,009 Original Poster	Well the 1.5x definitely works for me Jay, but as I said, sometimes there is a little hunting and a small delay in the AF locking on the target. I have the DG version which I purchased only a few months back. I did have the DA 300 ordered from a German company but they couldn't give me any idea of a delivery date so I bought one from Prodigital 2000 in the end. I will compare the contacts of the 1.5x and 2x TCs in more detail and post some shots taken with the DA 300 when I have a bit more time. Paul Last edited by channeler; 04-24-2008 at 03:18 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
For Sale - Sold: Kenko Pz-AF 1.5x Teleconverter (SDM)	Rykoh	Sold Items	1	12-31-2009 04:15 AM
Converting a Kenko 2x converter for SDM!?	Douglas_of_Sweden	Pentax SLR Lens Discussion	36	07-21-2009 03:35 PM
Kenko teleconverters	Clem Nichols	Pentax SLR Lens Discussion	0	11-15-2008 08:33 AM
Teleconverters and SDM	Arpe	Pentax SLR Lens Discussion	7	09-11-2007 05:58 PM

04-24-2008, 02:22 PM	#2
Buddha Jones Veteran Member Join Date: Sep 2006 Location: Charlotte, NC Photos: Gallery Posts: 2,587	Really, I thought this was proven not to work... and where did you get your DA*300 from?

04-24-2008, 03:46 PM	#4
Fototim Senior Member Join Date: Sep 2006 Location: Norway Posts: 268	Let me fill in that the Pentax F-1,7x works very well with this lens. AF is fast, but off cource noisy. Optical performanse is pretty good too, you just need to step down a bit. Wide open, it is a bit too soft for my liking. MaritimTim

04-24-2008, 04:03 PM	#5
John Kovarik Veteran Member Join Date: Sep 2007 Location: West Virginia Photos: Gallery Posts: 338	That mirrors my findings too (I don't have the Kenko 2x). I also bought my DA* 300 from prodigital2000, and a 35/2.8 macro at the same time............good folks.