2x Teleconverter


purpleski

Link Posted 30/03/2008 - 18:36
Hi

I purchased for very little a Jessops 2x teleconverter on ebay for very little but in all honesty it is pretty rubbish.

I have done a bit of Googling and come across the

Kenko Teleplus DG 2x MC4 Teleconverter for Pentax AF

priced at around 87.00.

Does anybody have any experience with this or other teleconverters that could be recommended. I can not afford to buy a 400mm or 600mm lens!

Thank you.
purpleperson

MX veteran

Link Posted 30/03/2008 - 19:30
At best most converters give inferior results. It is often better just to crop the picture taken without one.
K100D Super, 18-55, 50-200, Sigma 10-20, Sigma 70mm macro and lots of old lenses

iceblinker

Link Posted 30/03/2008 - 19:52
How about a 1.5X as a compromise?

The Kenko 1.5X is decent.
~Pete

Gwyn

Link Posted 30/03/2008 - 20:11
What lens are you using it with? Not all converters work with all lenses.

George Lazarette

Link Posted 31/03/2008 - 01:57
Because converters effectively enlarge the image formed by the lens, any imperfections or lack of sharpness will be magnified.

For that reason, converters only work well with very good, and sharp, lenses. If you do have such a lens, the converter will perform satisfactorily.

G
Keywords: Charming, polite, and generally agreeable.

almierau

Link Posted 01/04/2008 - 14:04
I've used a Tamron 2x for some years, but that was not a cheap lens by any means. And it is best to use a device like this on a lens that is of good quality to start with.

Don

Link Posted 01/04/2008 - 14:10
I have the pentax 1.7 af and it is great... but not with all lenses.
in fact the lenses it performs best with are short range, high quality zooms, prime,s and manual focus lenses like the 85mm soft. I get decent results with a sigma 400mm f4 and not so hot with the pentax 28-200.
Fired many shots. Didn't kill anything.

almierau

Link Posted 01/04/2008 - 14:44
I get good results using a tamron 350mm mirror lens. I recently had a 500mm Tamron mirror gifted to me by one of my students in the UK.
Got here to western Canada in six days. Using the 2x on that is ok, but certainly not the quality I get on the 350mm, ... The 500 also is several years older , probably early 1980s.

With my f2.8 80-200mm Sigma, the 2x extender works very well. However by then you certainly have to be lugging along a tripod or monopod.


Don wrote:
I have the pentax 1.7 af and it is great... but not with all lenses.
in fact the lenses it performs best with are short range, high quality zooms, prime,s and manual focus lenses like the 85mm soft. I get decent results with a sigma 400mm f4 and not so hot with the pentax 28-200.

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