ProfHankD

ProfHankD

Lives in United States Lexington, United States
Works as a Professor
Has a website at http://aggregate.org/hankd/
Joined on Mar 27, 2008
About me:

Plan: to change the way people think about and use cameras by taking advantage of cameras as computing systems; engineering camera systems to provide new abilities and improved quality.

ProfHankD's recent activity

  • Looks like the same lens sold by Vivitar. Ok in the center, but even by the MFT edge it's got a lot of CA (partly fixable). My one-liner summary was (compared to the 28mm f/2.5 Rokkor, which is ...
  • Replacing the radioactive doping would almost certainly have meant using glass with sufficiently different properties to require changes to the lens formula. As manufacturers are so fond of saying, " ...
  • You know the sunny 16 rule? Well, the Sun itself is about 15 stops brighter than that. Of course, during totality it gets VERY dark... but ONLY for TOTALITY and around 2 minutes.
  • For you or your camera? For your camera, it just needs to be dark enough to not bake. There are lots of viable choices, including things like color film and darkly-tinted plastic or ND filters. ...
  • Yes, it is -- and most of the difference is in how they use a lens designed for FF, although low light performance is probably a bit better too. Here's the DPReview article I wrote on old lenses ...
  • On an IQ basis, the only thing that doesn't obviously favor the A7 is video... which you don't mention as a priority... and the A7 is even cheaper. Much cheaper if you care about wide angles, ...
  • Created discussion thread 3D-Printed Screw-In Solar Filters
    I posted a link to an instructable on making bayonet-mount solar filters for the Canon PowerShot SX530 HS... but what if you don't have that? Well, here's my design for 3D-printed screw-in solar ...
  • Actually, it allows the exact same tech used in their DSLRs to solve 1, 2, 3, and 4... just as it solved those same issues for Sony nearly a decade earlier with their SLT bodies (even before the ...
  • I have the FL 55mm f/1.2 and, honestly, it's not looking all that different (nor worse, especially given a $200 cost via eBay). The vignetting wide open is pretty severe, OOF PSF have a bright ...
  • Well, Nikon isn't exactly leading the pack in mirrorless, but cloning the mechanism used in Sony's LA-EA2/4 is certainly a low-risk, minimum-engineering-effort, way to get a mirrorless body to ...
  • I never heard of them before either. Looking at a couple of issues, it's really impressive. Coffee-table worthy. Unfortunately, I'm not sure the words "financial viability" come easily for an art...

  • Excellent review again! However, radioactive yellowing isn't like having a yellow filter. The yellowing is a chemical change in the glass, and doesn't necessarily just change color -- it can change ...
  • Replied in KeyMission 360
    Keep in mind that the Insta360 is NOT a stand-alone camera, but needs a USB host -- cell phone or laptop. That said, yeah, it's a much better deal.
  • Cell phones definitely do a good enough job for smallish online images, and computational photography methods will continue to make them better, but you really can't get past basic physics: you...

  • I recently got one of those sub-$5 USB power monitors (really nice to have one). I was surprised to see my A7RII drawing 1.5A when charging in camera! In fact, plugging into a current-limiting hub ...
  • Nope. The photographer initiated the capture. The tiger simply wasn't very good at taking direction as a model... or maybe it was VERY good at that?

  • Dheorl: "People are people, so why should it be you and I should get along so awfully?" -- Depeche Mode. I think people are generally insecure about their big purchases; they need reassurance that...

  • String: As a computational photography researcher, I make a lot of measurements (e.g., OOF PSF). I appreciate what DxO has done in openly publishing test results and I have the greatest respect for...

  • The little Sony RX100 V (or one of its older brothers which also have merely 1" sensors) produces IQ that compares well with that of a PEN-F with 12-40. Most DxO measurements are very similar, and...

  • Well, it explicitly says for Sony Alpha cameras. I don't think one lens or one body, let alone a flash, would be that big a deal for all Alpha cameras... but Pro Support could be. I just doubt ...
Activity older than 12 months is not displayed.
Total messages 4986
Threads started 142
Last post 4 hours ago
Total comments 1396
Total likes 3049
Last post 4 days ago
Total reviews 21
Last review 1 month ago
Entries 92
Votes cast 1937
Last entry 1 month ago
Photos uploaded 157
Last upload Dec 19, 2010