Karl_Guttag

Lives in United States Allen, TX, United States
Has a website at www.kguttag.com
Joined on May 25, 2011

Karl_Guttag's recent activity

  • As others have said, you can get a teleconverter, either Canon or one of the 3rd party ones. I have the 100-400 IS L mk.1 and some old Kenko 2x and 1.4x extenders and the RP will autofocus with ...
  • I have tried converting things in Adobe RAW, DPP4, and DXO 4. DPP4 definitely has better lens profiles and handles various chroma aberrations the best, but as RDKirk indicated DPP4 is pig slow. DXO ...
  • Wild enthusiasm can get away from people and I would not confuse the RF24-240 for being an L lens by today's RF-L standards. Still, the RF24-240 does exceed many people's expectations and it is a ...
  • I turned on my RP with the RF24-240 (at 90mm) with both my dogs. I call them "the dynamic range test" similar to JustUs7's dogs. Below is just a quick snapshot with poor lighting at f6.3, 1/60th ...
  • A fair set of pros and con's IMO. It is a bit soft at the far end and could use stopping down a bit to help. Being f6.3 has it drawbacks if there are not bright lights and motion. I still think in ...
  • BTW, this is the same photo after DXO4 from CR3 with Deep Prime (noise reduction/enhancement). I will note that somehow DXO 4 looks like it fiddled the exposure a bit (I checked and the exposure ...
  • I grant you the picture from your RP looks bad. Maybe something is wrong with your unit too. But this is clearly not what most people are seeing with their RP. This forum would be full of ...
  • These references are excellent in explaining how to simply and accurately test a lens. They show a simple field curvature test that anyone can do that generally agree with $250K of test equipment.
  • I don't know how big the fiber is or if it should be considered "out of spec." But I seriously doubt it is hurting the image. The farther away from the sensor, the less it will hurt the image. I ...
  • Abbot, Frost, Rockwell, and Liang each look at things a little differently but generally seem to come to the simialr conclusions. Rockwell followed by Liang seems to be the most "generous" and ...
  • To me, the battery life is my biggest complaint with the RP. A mirrorless camera tends to need more battery and the battery on the RP is tiny. They almost had to work at it. It looks like they were ...
  • Where did I write that it was my favorite lens? Where did I even defend the lens? My comments were directly aimed only at your comparison being totally invalid. You screwed up the exposure and the ...
  • Why would you grossly underexpose the shot and screw up the color balance? If your point is that it can be better to have f2 than f2.8, then come out and say that. But then the 100-500f4.5-7.1, or ...
  • Thanks, you are coming at this from a different perspective as a pro photographer. I'm an engineer that likes photography. My point was that the whole comparison was bogus. I love objective ...
  • Yes, and per my post, even the white balance is different. At this point, I wonder if the focus was screwed up too. Plus, I would like to know the conversion software used as am seeing a ...
  • This whole thread started with a post of ONE comparison shot by the RF15-35f2.8L at 35f2.8 and the RF 28-70f2 at f2 and 30mm. We only have a screenshot of each at 66% scaling. No EXIF, no other ...
  • I know that with "modern" IS you are supposed to be able to use it with IS enable (on this lens Mode 1, see the quote from The Digital Pixel Below) From TDP on this lens: I still wonder if there ...
  • I place the DDP4 with correction on top of your first one and when back and forth. The difference between DPP4 and DXO with no corrections makes it looks like you took it with a  different lens. I ...
  • Before doing anything rash, I would suggest your process the exact same photos in with Canon's DPP4. While slow and a pain to use, I have found so far its lens correction to be better than Adobe ...
  • Replied in RF Mount
    Let me be clear, I would like to see Canon actively support 3rd part lenses like Sony. To the user, it is a disadvantage. That said, as a user, I would be more cautious of using 3rd part lenses ...
Activity older than 12 months is not displayed.
Total messages 285
Threads started 12
Last post 6 hours ago
Total comments 0
Total likes 0
Total reviews 0
Entries 0
Votes cast 0
Photos uploaded 0