• justaCanonuser
    nice frog in the green, but it looks like sharpness isn't exactly on the frog's eye, so the camera's AF struggled a bit ;)
  • justaCanonuser
    According to CIPA, the RF version has a tad better IS, but in real life it shouldn't make any noticeable difference. I have the EF 600mm...
  • Kingsix88
    If I remember correctly, when Canon first came out with the RF mount, these was something strange with the image on third party lens...
  • Raptors
    Raptors replied to the thread F00 conundrum.
    I do not own a 600mm lens but recently traveled to South Africa in July 2025 and used the RF 100-300mm 2.8 (CPS trial run) lens. I...
  • justaCanonuser
    It is fast, no question, but as I said the difference isn't noticeably big when we shot w/o TC side by side. But with TC, the difference...
  • justaCanonuser
    that's true, I agree I know, Canon revolutionized the common tele lens design with the EF 600/4 III by moving main parts of the front...
  • tiggy@mac.com
    Canon's ways of limiting Sigma are many and complex, not least because the intellectual property levers they have operate differently in...
  • B
    I disagree with your conclusion. Sigma already makes FF lenses that could be ported to RF. They have a mount conversion service costing...
  • P-visie
    When I visited the Isle of May with a small group of photographers, a tern shat on the front of the lens and the inside of the lenshood...
  • D
    A red kite or a red shi*e?
  • DocInfoSci
    Makes sense. I agree, it’s not the contract (license) that’s the issue here but some other business constraint. I was thinking more in...
  • I
    All of Sigma’s current RF APS-C lenses DO have control rings: for the older ones it doubles up as the manual focus ring (same as all of...
  • P-visie
    Canon has stated in an interview in a Japanese newspaper that camera prices may be affected by rising prices of memory chips. Google...
  • neuroanatomist
    Well, it would put the ‘fluorine’ (fluorocarbon) coating to the test. :poop::sneaky::sick:
  • H
    I'd say I'm definitely hoping for something more like $8k, and I'm fully prepared to be disappointed lol. The 100-300 f/2.8 L definitely...
  • P-visie
    I hope it missed you (and your camera and lens) :ROFLMAO:.
  • neuroanatomist
    neuroanatomist replied to the thread F00 conundrum.
    Nope, I believe I stated that it didn’t solve my problem (or at least, that’s what I meant to state). That was before I deleted all of...
  • P-visie
    P-visie replied to the thread F00 conundrum.
    You stated (or I interpreted it that way) in another thread that the problem was solved by cleaning the contacts. Is that correct?
  • DocInfoSci
    In terms of third party lenses, I found over the years the following: Optical quality tended to be equivalent to the better non-L Canon...
  • AlanF
    This is a BIS - Red Kite (R5ii + RF 200-800mm).
    • Red_Kite_Pooing.gif
  • A
    IMO, Sigma is often first out of the gate. Then, some time later, Canon comes along and releases something that is typically better...
  • roby17269
    I am not sure I understand to what the RF mount is superior... other mounts have pros and cons and their own areas of excellence, same...
  • neuroanatomist
    You can AF with the combination in Live View. It’s slow, but it works. Live view works at f/11 with the 2x TC as well.
  • mangobutter
    Interesting. I sort of thought it had to do something with that but i thought i'd at least be able to use central point. Shucks, so no...
  • dolina
    Sigma offers attractive Art lenses at select focal lengths but the assertion that they could motivate system-switching ignores optical...
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