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Kenko 2x Converter For EOS  
User currently offlineMarco_polo From United States of America, joined Jul 2001, 324 posts, RR: 17
Posted (10 years 11 months 2 weeks 3 days 9 hours ago) and read 2722 times:

Fellow DSLR Users:

Have anyone has experienced using Non-Canon 2x Converter from Kenko? I have seen a 2X Converter from Canon that only works with the L-Lense series.

If anyone has experienced with Kenko 2X Converter, is it compatible with Canon 75-300IS and Vivitar XR/IF 28-300mm?

How is the quality?

Thanks for you help people.

Sincerely,

Jay Piboontum

9 replies: All unread, jump to last
 
User currently offlineManzoori From UK - England, joined Sep 2002, 1516 posts, RR: 33
Reply 1, posted (10 years 11 months 2 weeks 2 days 20 hours ago) and read 2673 times:

Hi Jay,

I'm using a friends Kenko Teleplus Pro300 2x convertor for the moment, though not with either of the lenses you mentioned.

It's been used with my Canon 75-300 USM III non IS lens. As with all 2x extenders it reduces the aperture at 300mm from f5.6 to f8, which then means that the AF won't function. There is a way to fool the system by taping some of the pin connections between the lens and the convertor but I don't recall ever getting that to work.

I've not been able to take any decent handheld shots with the doubler on. What I have found it useful for is taking shots of the moon, but this means setting up on a tripod, setting mirror lockup, manual focus and timer shutter release. Even then the results are very hit and miss but that's more likely down to my ineptitude at manual focusing!

Cheers!

Rez
 Big thumbs up



Flightlineimages DOT Com Photographer & Web Editor. RR Turbines Specialist
User currently offlineHisham From Lebanon, joined Aug 1999, 701 posts, RR: 11
Reply 2, posted (10 years 11 months 2 weeks 2 days 20 hours ago) and read 2653 times:

it reduces the aperture at 300mm from f5.6 to f8

It should reduce the aperture to F/11 as you loose two stops with a 2X converter.

Hisham.


User currently offlineManzoori From UK - England, joined Sep 2002, 1516 posts, RR: 33
Reply 3, posted (10 years 11 months 2 weeks 2 days 19 hours ago) and read 2642 times:

eh?

I'm at f5.6... I lose one stop I'm at f6.7... I lose another I'm at f8?

No?  Confused  Confused  Confused


Rez
 Big thumbs up

[Edited 2004-01-09 18:56:52]


Flightlineimages DOT Com Photographer & Web Editor. RR Turbines Specialist
User currently offlineKingwide From United Kingdom, joined Aug 2001, 838 posts, RR: 18
Reply 4, posted (10 years 11 months 2 weeks 2 days 18 hours ago) and read 2632 times:

F5.6 - F6.7 is half a stop.

Basically the aperture scale in whole stops goes: F2.8 - F4 - F5.6 - F8 - F11 - F16


J



Jason Taperell - AirTeamImages
User currently offlineManzoori From UK - England, joined Sep 2002, 1516 posts, RR: 33
Reply 5, posted (10 years 11 months 2 weeks 2 days 18 hours ago) and read 2627 times:

Ahhh! That'll be it then! Big grin Thanks Andy!

Cheers!

Rez
 Big thumbs up



Flightlineimages DOT Com Photographer & Web Editor. RR Turbines Specialist
User currently offlineKingwide From United Kingdom, joined Aug 2001, 838 posts, RR: 18
Reply 6, posted (10 years 11 months 2 weeks 2 days 17 hours ago) and read 2615 times:

Andy???? Please don't tell me I sound like Andy  Big grin


J




Jason Taperell - AirTeamImages
User currently offlineMarco_polo From United States of America, joined Jul 2001, 324 posts, RR: 17
Reply 7, posted (10 years 11 months 2 weeks 2 days 17 hours ago) and read 2613 times:

Hey Guys:

Thanks for the response!!! Many thanks for your first hand experience account with Kenko 2x Converter. I did read breifly about the converter specifications and what are the limitations. Although they mentioned that Auto-Focus will work in "Great" lighting condition and with Aperature above 4. There is no real "lum" or "lux" detail on what they meant by "Great" lighting condition. I am guessing 12 noon high sunlight LOL....  Smile

Oh... well, I guess I am going to the camera store this weekend to take a look at it myself. I have to agree with you guys that a 2X converter may not perform well for any aircraft photogrpaphy. Maybe I will just have to invest in an actual lens.


Many thanks again for your time.

Cheers - Jay



User currently offline2912n From United States of America, joined Oct 2001, 2013 posts, RR: 8
Reply 8, posted (10 years 11 months 2 weeks 2 days 16 hours ago) and read 2601 times:

Jay...look at some of CKW's work. He has done a ton of stuff with both 2x and 1.4 (although Canon brand I believe.) He has doubled them up along with a prime lens and has come up with some stunning work, but I would bet he went through lots of rejects to master it!

Tony


User currently offlineManzoori From UK - England, joined Sep 2002, 1516 posts, RR: 33
Reply 9, posted (10 years 11 months 2 weeks 2 days 14 hours ago) and read 2587 times:


 Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment Embarrassment

Rez
 Big thumbs up



Flightlineimages DOT Com Photographer & Web Editor. RR Turbines Specialist
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