beetlebug

Lives in United States SC, United States
Joined on Feb 23, 2010

beetlebug's recent activity

  • Looks like they should be able to retrofit the existing EF lenses to RF mount. Probably won't, but ...

  • I use both the em-1 and TG6 so the app will work for both. If I need better accuracy, I'll use my bad elf pro bluetooth GPS in combo with the phone app - works great.
  • I'll assume the main reason for these is that they'll be compatible with the new RF teleconverters. Who wants an adapter and an EF teleconverter?

  • I know, the GPS is a downgrade from the TG-3 IMO.  I don't use the built in GPS anymore - they have a phone app - o.i. share/o.i. track that will work with the TG-6 to geotag your photos. I'm a big ...
  • I had suggested something similar - set the lens to f/11 - remove with camera still on - locks aperture.  Measure the light output with a light meter, repeat same with any TC and measure again. ...
  • OK, I give up. TCs have no effect on actual exposure, they don't enlarge the image circle and reduce light intensity per unit area on the sensor - that's just my assumption. I guess I still think ...
  • I understand perfectly - simple question: Does adding a TC decrease the light projecting from the lens or not? Yes, you can make adjustments and compensations, but the fact remains - you will ...
  • Of course - but the point is and always was - you lose light by using a TC - at all apertures compared to a bare lens! Because Canon makes all these adjustments in camera - it is difficult to see ...
  • I think we have lost sight of the basics since cameras take care of so much. Another quote
  • I guess the only way to demonstrate this would be to set a Canon lens to say f/8 and take it off the camera - actual physical aperture size would be locked. Measure the light through it with a TC ...
  • Oh no! A TC works by enlarging the image circle - it does this for ALL apertures - you will always lose a stop of light by using it - simple physics. All else being actually equal, it's IMPOSSIBLE ...
  • Created discussion thread Canon DSLRs and TCs
    Maybe an odd question. I was 'discussing' TCs with someone and getting nowhere - see attached. He really believes that there is no light loss when using a TC once you stop down!  Does anyone have ...
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