Sponsor Message:
Aviation Photography Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Kenko 2x Converter For EOS  
User currently offlineMarco_polo From United States of America, joined Jul 2001, 324 posts, RR: 17
Posted (10 years 9 months 4 weeks 15 hours ago) and read 2691 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 9 months 4 weeks 2 hours ago) and read 2642 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 9 months 4 weeks 1 hour ago) and read 2622 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 9 months 4 weeks 1 hour ago) and read 2611 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: 19
Reply 4, posted (10 years 9 months 4 weeks ago) and read 2601 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 9 months 4 weeks ago) and read 2596 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: 19
Reply 6, posted (10 years 9 months 3 weeks 6 days 23 hours ago) and read 2584 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 9 months 3 weeks 6 days 23 hours ago) and read 2582 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 9 months 3 weeks 6 days 22 hours ago) and read 2570 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 9 months 3 weeks 6 days 20 hours ago) and read 2556 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
Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Best Spotting Settings For A EOS Digital Rebel posted Sun Sep 17 2006 23:50:11 by Airlinelover
Need Info On A 2x Converter posted Tue Aug 22 2006 21:17:58 by EZYAirbus
Canon EF 500 Is / 600 Is + 2x Converter? posted Mon Apr 25 2005 22:09:30 by Birdlike
1,4x Converter For Tamron/Sigma posted Wed Aug 11 2004 23:59:22 by Volare
Anyone Tried The DCR2020 2.2x Converter? posted Fri Jul 9 2004 00:12:58 by Oly720man
Settings For Eos 300D. posted Mon Feb 16 2004 16:52:52 by Embraer145
Converter For The F717 posted Thu Jul 17 2003 04:30:12 by DC9
Short Lens Suggestion For EOS 10D? posted Mon Jul 14 2003 02:37:56 by Patroni
300mm + 2x Converter =? posted Thu Dec 19 2002 22:43:34 by AA 777
Delicious Lens Available For EOS Slr/dslr Users posted Wed Dec 4 2002 19:04:08 by Joe pries