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  1. Infidel

    Please advise on how to create ideal Linkedin profile picture

    Hi all, I am wondering if I can get some pointers on what makes a good Linkedin profile picture. From a relatively superficial google search, I learned that a headshot with a natural smile and profession-appropriate clothing is a good start. The job field is scientific research (biology, either...
  2. Infidel

    Enterprise on the Hudson

    Feel free to comment. These are not great, technically speaking. The barge was moving surprisingly fast and the place where I was standing was a bit crowded.
  3. Infidel

    Political discussion is not allowed, but I'm seeing a lot of political advertising

    Specifically, the ads are from lobby/interest groups, criticizing the policies of the governor of my state. Whether I agree or disagree with the message from the advertisers is immaterial. I think this policy of forbidding political discussion, while allowing political advertising sends a mixed...
  4. Infidel

    Why does my iMac make huge PDFs?

    Started with a MS Word document (docx file): 29KB On the iMac, generated a pdf, both with "print to pdf" and "save as" commands, as well as adobe acrobat pro: ~130KB...selected option to make small file size...same deal...130KB. There's even a "compress pdf" script you can add to snow...
  5. Infidel

    Iron wood tree at Joshua Tree National Park

    This is my first photo upload here! I was in San Diego last week for a conference and rented a car and drove to Joshua Tree National Park after the conference ended. Anyway, I came away with a handful of keepers, but this was one of my favorites. Shot hand held in RAW, F/10, 1/60s, ISO 200 (base...
  6. Infidel

    How can a lens have defective autofocus?

    This question has been nagging at me for some time now. I've read several instances of how many third party lenses are a great value, often accompanied by the caveat that it must be a good copy, as several copies have front or back focusing issues. How can one lens focus perfectly on a camera...
  7. Infidel

    Need to buy tools, please advise

    This may be a long shot, but can anyone recommend a brand for a general purpose technician's tool set? Price is not as important as quality, as these tools will be used to maintain and adjust expensive, and in some cases, custom-made laboratory instrumentation/equipment. I know many auto...
  8. Infidel

    Long exposures and motion blur (tripod vibration)

    I have a question related to exposure duration and motion blur. I would think that once the exposure duration is beyond 1 second or so (probably even shorter) any motion blur due to tripod vibration would be more or less equivalent, on up to 30 second exposures. In other words, I don't think...
  9. Infidel

    Nikon 55-300 f/4.5-5.6 vs. 70-300 f/4.5-5.6

    This lens: Nikon AF-S NIKKOR 55-300mm f/4.5-5.6G ED VR Zoom Lens 2197 - B&H vs. this lens: Nikon AF-S VR Zoom-NIKKOR 70-300mm f/4.5-5.6G IF-ED 2161 - B&H Assuming the 55-300 performs like the 55-200 but with more reach, does the 70-300 offer anything to justify the higher price tag? Is...