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About jeffb

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  1. @Jochen Pentax has a TAV mode, where the user sets aperture and shutter speed with auto ISO. Since you are manipulating ISO in order to get an appropriate shutter speed, I wonder if I would be better off setting shutter speed directly after setting my aperture to the lowest possible value. Probably it doesn't matter, and I should just experiment and find out what works better for me, but I thought I'd get your input in case I'm missing something. Thanks again for this thread!
  2. @Jochen This is extremely helpful! I have been trying to do this, but not as systematically and not always in the same order of steps, with highly variable results. Thank you!
  3. If you do decide to move to DSLR, you might consider Pentax as well. A few years ago I went from an old Lumix bridge camera to DSLR, and the Pentax K-50 with 2 kit lenses provided all that I wanted at a much lower cost than Nikon or Canon. The biggest factor for me was low light sensitivity, as the old bridge camera just didn't have enough sensitivity for the early morning and evening game drives. I know that bridge cameras have greatly improved, but the larger sensor of the DSLR will always be a huge advantage. If I was more serious about photography I would have gone mirrorless, but they cost more than I was willing to spend. Of course now I'm looking for a longer lens for the next safari....
  4. Very interesting. I was surprised to see how low South Africa is ranked.
  5. Thanks for posting this, as this is a topic of particular interest to me.
  6. A new study indicates that the Mara river ecosystem is influenced by, and depends upon, mass wildebeest drownings. Newspaper account here Research article here
  7. An interesting article just came out demonstrating, from DNA sequencing of ancient cat remains, that the domesticated cat was spread in 2 separate waves, first from the fertile crescent and then later from Egypt. Here is a newspaper article on the findings and here is the original research paper.
  8. Thanks for posting this, Tom. Fascinating work. There was a similar study a few years ago on hyenas which also showed that the microbial community composition was correlated with the chemical composition of the scent. I guess the fermentation hypothesis is well supported at this point.
  9. Thanks for posting this, Tom. Very interesting article, and quite a lot to be concerned about.
  10. @@kittykat23uk - A very good idea for a new thread. And what a great sighting!
  11. Here's an open-access article showing that a majority of primate species are threatened with extinction.
  12. Here's a new article estimating total cheetah population worldwide at 7100 and calling for cheetahs to be listed by IUCN as an endangered species.
  13. Thanks for posting this! Very interesting approach, though I'm going to have to read the paper a few times to really understand what they did and the inherent assumptions in the model.
  14. My favorite part of our crater visit was a walk with a ranger on the rim of the crater. We took about 1.5 or 2 hours, had numerous great views of the crater from the rim, learned about some medicinal plants, and saw some wildlife (giraffes) on foot. We finished up with a walk by a Maasai village. I enjoyed this more than the drive down into the crater the following day, but of course everyone's different. If this appeals to you, you could easily fit this into your drive back to Arusha and it would give you a chance to get out and stretch your legs in the midst of a long drive with a long flight ahead of you. Your TO can arrange it for you, and you could save a trip into the crater for another trip when you have more time.

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