teleconverter question
Posted 31/12/2008 - 11:56
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The auto in most cases refers to the teleconverter having linkages that will enable the lens to focus at open aperture and then stop down normally when the image is taken. This is a mechanical link and nothing to do with autofocus.
There are autofocus teleconverters with electronic contacts but I don't see many of them around.
There are autofocus teleconverters with electronic contacts but I don't see many of them around.
Best regards, John
Posted 31/12/2008 - 12:05
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maybe the new pentax one is worth waiting for? the Pentax-DA 1.4x one, though it's unclear how much it will cost.
K10D - Pentax 18-55mm kit - Pentax DA 55-300mm - Pentax FA 50mm 1.4
MX - Pentax-M 50mm 1.7, Pentax-M 28mm 2.8, Pentax-M 100mm 2.8
My Flickr Photostream
MX - Pentax-M 50mm 1.7, Pentax-M 28mm 2.8, Pentax-M 100mm 2.8
My Flickr Photostream
Posted 31/12/2008 - 12:09
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bigcog wrote:
maybe the new pentax one is worth waiting for? the Pentax-DA 1.4x one, though it's unclear how much it will cost.
It won't be cheap I would imagine. The Kenko 1.4 works with autofocus but not SDM. Not sure about the Kenko 2.0, I have one but haven't tried it yet. maybe the new pentax one is worth waiting for? the Pentax-DA 1.4x one, though it's unclear how much it will cost.
As Mike-P reports the Tamron 1.4 works with SDM.
(Edit )Sorry mine is the Kenko 1.5 not the 1.4
Camera:|K-7|
Pentax Lenses:|DA12-24/f4 ED AL|DA35Ltd Macro|FA31Ltd|FA77Ltd|FA50/1.4|F70-210|FA20-35 f4/AL|A*200/f4 Macro ED|A50/1.7|A50 Macro f2.8|1.7xAF adapter|
Voigtlander|125/f2.5SL Macro APO Lanthar|
Sigma Lenses:|EX DG 100-300 f4|2X & 1.4X TC|
Flashes:|AF540FGZx2|RingFlash AF160FC|
Pentax Lenses:|DA12-24/f4 ED AL|DA35Ltd Macro|FA31Ltd|FA77Ltd|FA50/1.4|F70-210|FA20-35 f4/AL|A*200/f4 Macro ED|A50/1.7|A50 Macro f2.8|1.7xAF adapter|
Voigtlander|125/f2.5SL Macro APO Lanthar|
Sigma Lenses:|EX DG 100-300 f4|2X & 1.4X TC|
Flashes:|AF540FGZx2|RingFlash AF160FC|
Posted 31/12/2008 - 12:13
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I can recommend the Kenko 1.5X Teleplus DG - auto focus (screw drive) and auto exposure, around £85. Google to find it.
By the way, it fully works with the Tamron 70-300mm at 300mm (F5.6), even though it's only supposed to work at F4 and brighter. The image quality is surprisingly good as long as you can minimise camera shake.
1.5X and 1.4X converters generally have less negative affect on image quality than 2X, so look on the bright side!
By the way, it fully works with the Tamron 70-300mm at 300mm (F5.6), even though it's only supposed to work at F4 and brighter. The image quality is surprisingly good as long as you can minimise camera shake.
1.5X and 1.4X converters generally have less negative affect on image quality than 2X, so look on the bright side!
~Pete
Posted 31/12/2008 - 12:25
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good to know, thanks for that. i would be using it on my tamron 70-300. After taking shots of deer in Fountains abbey i really wanted a reliable TC to get the albino deer but they were just too far away. i'll post on the photo thread the good results i got.
K10D - Pentax 18-55mm kit - Pentax DA 55-300mm - Pentax FA 50mm 1.4
MX - Pentax-M 50mm 1.7, Pentax-M 28mm 2.8, Pentax-M 100mm 2.8
My Flickr Photostream
MX - Pentax-M 50mm 1.7, Pentax-M 28mm 2.8, Pentax-M 100mm 2.8
My Flickr Photostream
Posted 31/12/2008 - 15:52
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I have the Sigma 2X (£99 from SRS) and its excellent with my Sigma 70-200mm f2.8 and Pentax F* 300mm f4.5 but it will only manual focus with the Pentax lens.
It will not fit many lenses though as the front element of the Sigma converter sticks out (unlike my Tamron 1.4X units) and so you need a recess on the lens you are fitting it to.
Easiest way to explain is male to female.
The Tamron 1.4X MC4 AF unit will work on everything and is actually pretty good.
It will not fit many lenses though as the front element of the Sigma converter sticks out (unlike my Tamron 1.4X units) and so you need a recess on the lens you are fitting it to.
Easiest way to explain is male to female.
The Tamron 1.4X MC4 AF unit will work on everything and is actually pretty good.
Posted 02/01/2009 - 22:48
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I recently was loaned a copy of the supposedly best non-Pentax TC available, Tamron 1.4X PZ-AF MC4...I tested it with the Pentax 55-300 & found the results very disappointing & didn't purchase the TC...
I'd only recommend using a TC if you have expensive/high end glass, from my experiences at least the results with anything else will leave you disappointed...the new Pentax TC is intriguing although I tend to think the same "rules" will apply
simon
I'd only recommend using a TC if you have expensive/high end glass, from my experiences at least the results with anything else will leave you disappointed...the new Pentax TC is intriguing although I tend to think the same "rules" will apply
simon
My website http://www.landscapephotographyuk.com
My Facebook page http://www.facebook.com/landscapephotographyuk
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My Facebook page http://www.facebook.com/landscapephotographyuk
Find me on Google+ link
Posted 03/01/2009 - 16:00
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Clarky wrote:
It won't be cheap I would imagine. The Kenko 1.4 works with autofocus but not SDM. Not sure about the Kenko 2.0, I have one but haven't tried it yet.
As Mike-P reports the Tamron 1.4 works with SDM.
(Edit )Sorry mine is the Kenko 1.5 not the 1.4
The Kenko 1.5 does work with SDM, you need to make sure you get the one with the Pz designation as that model has the powerzoom connections that SDM uses. I have a recent one that works fine with the DA* 300mm.
It won't be cheap I would imagine. The Kenko 1.4 works with autofocus but not SDM. Not sure about the Kenko 2.0, I have one but haven't tried it yet.
As Mike-P reports the Tamron 1.4 works with SDM.
(Edit )Sorry mine is the Kenko 1.5 not the 1.4
Posted 03/01/2009 - 19:55
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simonkit wrote:
I'd only recommend using a TC if you have expensive/high end glass, from my experiences at least the results with anything else will leave you disappointed.
It depends how serious a use you have for the TC. If it's just to pick out interesting extra detail in the distance, I found a cheap Kenko TC + budget Tamron zoom did the job.I'd only recommend using a TC if you have expensive/high end glass, from my experiences at least the results with anything else will leave you disappointed.
It's easy to confuse camera shake with poor lens/TC performance. Using 300mm X 1.5 hand-held is not easy.
~Pete
Posted 03/01/2009 - 20:16
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ffordes have 2 second hand!.........£99 and £159...........Ken
K20D...ist DS ,DA18/55,DA16/45.DA* 50/135,"A"1.7 50MM..."A" 70/210..M 50mm f2...Tamron 90mm macro,28/300 Tamron,200/500 Tamron 6.9....A Pentax DA*300... Sigma10/20,FA31mm 1.8 Ltd*********,FA 77mm Ltd!
Posted 03/01/2009 - 21:15
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iceblinker wrote:
It's easy to confuse camera shake with poor lens/TC performance. Using 300mm X 1.5 hand-held is not easy.
I'd agree a TC can be useful with a consumer lens if you choose not too be too fussy about sharpness. I tested the TC tripod mounted & hand-held but unfortunately just wasn't pleased with the results, I'm awaiting some feedback on the new Pentax offering to see if it's any better....also if it records focal length correctly which may help the IS a littlesimonkit wrote:
I'd only recommend using a TC if you have expensive/high end glass, from my experiences at least the results with anything else will leave you disappointed.
It depends how serious a use you have for the TC. If it's just to pick out interesting extra detail in the distance, I found a cheap Kenko TC + budget Tamron zoom did the job.I'd only recommend using a TC if you have expensive/high end glass, from my experiences at least the results with anything else will leave you disappointed.
It's easy to confuse camera shake with poor lens/TC performance. Using 300mm X 1.5 hand-held is not easy.
simon
My website http://www.landscapephotographyuk.com
My Facebook page http://www.facebook.com/landscapephotographyuk
Find me on Google+ link
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Find me on Google+ link
Posted 03/01/2009 - 22:21
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How much sharpness do you expect from a TC? More than this?:
[IMG]http://i493.photobucket.com/albums/rr298/lime501/_IGP0027_.jpg[/IMG]
[IMG]http://i493.photobucket.com/albums/rr298/lime501/_IGP0027_crop2.jpg[/IMG](100% crop)
*ist DS + Tamron 70-300 + Kenko 1.5X
450mm f5.6 1/320 handheld iso800
I was delighted rather than disappointed with this. Fascinating I think to see detail that I'd never noticed before by eye on this familiar landmark.
[IMG]http://i493.photobucket.com/albums/rr298/lime501/_IGP0027_.jpg[/IMG]
[IMG]http://i493.photobucket.com/albums/rr298/lime501/_IGP0027_crop2.jpg[/IMG](100% crop)
*ist DS + Tamron 70-300 + Kenko 1.5X
450mm f5.6 1/320 handheld iso800
I was delighted rather than disappointed with this. Fascinating I think to see detail that I'd never noticed before by eye on this familiar landmark.
~Pete
Posted 04/01/2009 - 06:59
Link
chirpy wrote:
Chirpy, My Kenko 1.5 has the PZ designation and the power zoom contacts but still does not work with SDM. Clarky wrote:
It won't be cheap I would imagine. The Kenko 1.4 works with autofocus but not SDM. Not sure about the Kenko 2.0, I have one but haven't tried it yet.
As Mike-P reports the Tamron 1.4 works with SDM.
(Edit )Sorry mine is the Kenko 1.5 not the 1.4
The Kenko 1.5 does work with SDM, you need to make sure you get the one with the Pz designation as that model has the powerzoom connections that SDM uses. I have a recent one that works fine with the DA* 300mm.It won't be cheap I would imagine. The Kenko 1.4 works with autofocus but not SDM. Not sure about the Kenko 2.0, I have one but haven't tried it yet.
As Mike-P reports the Tamron 1.4 works with SDM.
(Edit )Sorry mine is the Kenko 1.5 not the 1.4
I will experiment a little more with it and try it on my DA*16-50.
Camera:|K-7|
Pentax Lenses:|DA12-24/f4 ED AL|DA35Ltd Macro|FA31Ltd|FA77Ltd|FA50/1.4|F70-210|FA20-35 f4/AL|A*200/f4 Macro ED|A50/1.7|A50 Macro f2.8|1.7xAF adapter|
Voigtlander|125/f2.5SL Macro APO Lanthar|
Sigma Lenses:|EX DG 100-300 f4|2X & 1.4X TC|
Flashes:|AF540FGZx2|RingFlash AF160FC|
Pentax Lenses:|DA12-24/f4 ED AL|DA35Ltd Macro|FA31Ltd|FA77Ltd|FA50/1.4|F70-210|FA20-35 f4/AL|A*200/f4 Macro ED|A50/1.7|A50 Macro f2.8|1.7xAF adapter|
Voigtlander|125/f2.5SL Macro APO Lanthar|
Sigma Lenses:|EX DG 100-300 f4|2X & 1.4X TC|
Flashes:|AF540FGZx2|RingFlash AF160FC|
Posted 04/01/2009 - 08:28
Link
Clarky wrote:
Chirpy, My Kenko 1.5 has the PZ designation and the power zoom contacts but still does not work with SDM.
I will experiment a little more with it and try it on my DA*16-50.
Odd. Mine definitely does work on the 300mm - I just tested it again.
Chirpy, My Kenko 1.5 has the PZ designation and the power zoom contacts but still does not work with SDM.
I will experiment a little more with it and try it on my DA*16-50.
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196 posts
18 years
North Yorkshire
I wonder if anyone can advise on what else there is second hand to look out for? Some on ebay say auto but is that autofocus or auto aperture? For example this: link
I don't have DA* lenses by the way.
Any recommendations greatly appreciated.
MX - Pentax-M 50mm 1.7, Pentax-M 28mm 2.8, Pentax-M 100mm 2.8
My Flickr Photostream