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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. Barred Wobbler

    New Sigma 150/600

    Scroll up the page to post 859 for my experience with the 150-600 Sport and a Canon 1.4x mkIII on my EOS 7dII. It doesn't like it.
  2. Barred Wobbler

    New Sigma 150/600

    150-600 Sport with Canon 1.4x MkIII Converter. About a year ago, after I bought my lens I posted on here that I couldn't get the lens in focus when mounted on my Canon 7DII with my Canon MkIII converter, even at maximum micro-adjustment on both the body and the lens. I even went so far as to...
  3. Barred Wobbler

    New Sigma 150/600

    I found out this morning that there's a firmware update available for the 150-600. It improves autofocus. I've downloaded it, but as usual with anything that needs a field test, there's heavy cloud forecast all day. I did hope that it would solve the misreporting problem, where since the last...
  4. Barred Wobbler

    New Sigma 150/600

    It was a brilliant day Paul. I've been to Duxford quite a few times, but it's hard to believe the last time was 6 years ago when I was there for a ride in a Tiger Moth. It seems like yesterday. The last time I was at Flying Legends was a while ago also. Frightening to think that it was as long...
  5. Barred Wobbler

    New Sigma 150/600

    I took my Sport to the Flying Legends air display at Duxford yesterday. I wasn't sure how it would perform on distant, fast moving objects, so I took my Canon 400/F5.6L as back-up because it's a lens I trust 100%. In the event I got to the display ground car park, took my rucksack out of the...
  6. Barred Wobbler

    New Sigma 150/600

    Sigma Optimization Pro Although I've used Optimization Pro on my 150-600 S with the teleconverter attached to tune the lens (without much success it must be said), I've not used it to fine tune the focus on my bare lens so far, because in general use the lens has performed well without it. I...
  7. Barred Wobbler

    New Sigma 150/600

    Bath Time One from tonight. I went out looking for owls. No owls, but a close hare and this even closer egret taking a dip. Also a longer range shot of our closest neighbour.
  8. Barred Wobbler

    New Sigma 150/600

    These were taken yesterday with the 7DII at 600mm full zoom. The first is near enough full frame and the second is about one quarter to one third of the frame. The lesser black back was very active and quick-moving because the black-headed gull was pestering it. The camera coped. Just a...
  9. Barred Wobbler

    New Sigma 150/600

    Chalk and Cheese I've just been out the back and fired off a couple of shots with the Canon 1.4 telecon. Unedited, but resized for uploading. Tripod-mounted, stabilisation off, aperture priority, Auto ISO (to take care of the changing light). First shot, standard in-camera focussing. Second...
  10. Barred Wobbler

    New Sigma 150/600

    I'd say the avocet in bright sunlight at a range of about 40 yards that I was trying to photograph this morning was contrasty enough, as was the oystercatcher that was slightly closer. A couple of uncropped photos from today below that I've pulled from the recycle bin. I think they are...
  11. Barred Wobbler

    New Sigma 150/600

    Ironically, I found that the Canon converter found focus better than the Sigma one. Still back-focusing, but it did it more quickly and without endless hunting.
  12. Barred Wobbler

    New Sigma 150/600

    That's what I thought at first, but since I've tried it with the Sigma 1.4 and got the same results, I'm not convinced.
  13. Barred Wobbler

    New Sigma 150/600

    No hope. I've persevered and I'm still suffering from rear focusing with a converter. I've even dialled in maximum adjustment in-camera (-20 on the adjuster) and also tuned the lens on the USB dock to give the maximum -20 on the 30m to infinity setting. I've just taken this photo of a felt...
  14. Barred Wobbler

    New Sigma 150/600

    It's 9pm and the light's shot, but a minute or two ago I tried a bit of micro-adjustment on the dock. I dialled in a random -10 on top of the -20 camera setting and fired off a shot of the farmhouse. It's as grainy as a flour mill at ISO 12,800, but there's enough of an improvement in clarity of...
  15. Barred Wobbler

    New Sigma 150/600

    That hedge is in better focus, you can see the sheep mesh on the fence. The frightening thing is that it's another 250 yards behind the focus point!
  16. Barred Wobbler

    New Sigma 150/600

    See my reply to your post on the other thread Roy. EDIT, I've just taken these photos at the back of the house. The distance to the subject is about 350 yards. One without the tc and one with. Both unedited jpegs apart from resizing for upload. The second photo has the maximum -20...
  17. Barred Wobbler

    New Sigma 150/600

    The rain eased this afternoon to be replaced by some hefty showers of rain and hail with some promising breaks in the cloud, so I broke out and went to a nearby cliff for a while. The first shot is about half of the frame, the second is almost the complete frame, with slight trimming on the...
  18. Barred Wobbler

    New Sigma 150/600

    Ah, that's the answer then Roy. I've got it switched to C1 and I've not got round to tuning the focus limits yet.
  19. Barred Wobbler

    New Sigma 150/600

    Focus Limiter Switch Am I missing something here? There were times on my trip last week that I realised after the event that I'd been taking photos of a close bird just after some distant flying stuff and I'd forgotten to reset the focus limiter from 10m-infinity. I expected that I'd be out of...
  20. Barred Wobbler

    New Sigma 150/600

    It's one that has been attracting attention for a while, but I've not bothered with it. I went there this morning just expecting to go to the hide, but as I got out of the car in the car park the owl was hunting in the field just over the wall, not more than 30 yards away. Right place, right time.
  21. Barred Wobbler

    New Sigma 150/600

    One from this morning.
  22. Barred Wobbler

    New Sigma 150/600

    You might say I'm 'choughed'. ;)
  23. Barred Wobbler

    New Sigma 150/600

    A few more from the trip, including one of the short-toed eagle that I was concerned about in my earlier posts. The ortolan was one of the last half dozen on the final evening as the sun poked through what had been a heavy overcast all day, with high humidity and a threat of thunder in...
  24. Barred Wobbler

    New Sigma 150/600

    Well. I'm delighted to say I was wrong. It just shows the danger of judging on things from the camera screen. I've just downloaded about two and a half thousand pics. It's late and I've had a long day travelling, including a 200 mile drive before the flight, but here's one to be going on with...
  25. Barred Wobbler

    New Sigma 150/600

    As I said, I don't really know how good or bad they are until I can download them when I'm back in the UK. I've only seen them so far on the camera screen, but what I've seen is giving me cause for concern. Some of them will be user error, because it's harder to track a relatively close raptor...
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