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Recent content by ondebanks

  1. ondebanks

    Kodak DCS Pro Back 645M

    Yes, but there is virtually no difference between the ProBack and ProBack Plus. So the ProBack Plus manual I supplied should be fine. OTOH, the ProBack 645 line was distinctly different. See here as well, for software and firmware...
  2. ondebanks

    Kodak DCS Pro Back 645M

    You don't have to use a 555 ELD. It will work with all 500 series Hasselblads; and with an appropriate interface accessory, it also works with the Mamiya RZ Pro line, the Fuji GX680 line, Bronicas, large format cameras etc. Don's link was for the 645 version of the ProBack. As you have the...
  3. ondebanks

    A switch: Phase One to Nikon.........

    So I take it that you don't much like dealers.....Ah!!! I've finally figured out what your signature line means! - Dealers do not email me asking to buy your products. This statement always puzzled me. I wondered - why are you telling me what dealers don't currently do, as it would be...
  4. ondebanks

    MFD Weather Sealing

    And I'd love to see the Alpa shot from Graham's BTS shot with the hotel towel! Especially how he dealt with that flat grey sky. Ray
  5. ondebanks

    CCD Sensor Cool Down Times

    That someone will be me :) There is. Tech alert, people! :lecture: There will be graphs! There will be equations! Look if you dare! You might even learn something. That something might even improve your art! ---- The approximate rule of thumb is this: long exposure noise (dark current) in...
  6. ondebanks

    Non-troll serious MF conundrum

    I'd agree with this. It was such a huge and unnecessary mistake by Phase to disable film back support from the DF onwards. I will never comprehend that move. All that was ever needed to operate the AF film backs is a signal across the contact pins - the same pins shared for use for the digital...
  7. ondebanks

    More to come From Hasselblad

    Yup, because with the ultra-short flange distances of mirrorless cameras, we could use/adapt our existing lenses from any MF SLR system; heck even 35mm lenses if you want to max out the image circle on a bigger sensor and don't mind some vignetting. While the Hartblei B2 and Alpa FPS systems...
  8. ondebanks

    MFD 'the look' conundrum

    But Mat, you did direct your post to MrSmith - you started that post to him by acknowledging his reply to your question - so what else were we to think? Fair enough - you were making a general point about the forum - but how was that point related to this thread, or the person you were...
  9. ondebanks

    MFD 'the look' conundrum

    He's saying that you posted a strawman argument, misrepresenting with MrSmith said - and I have to agree. MrSmith said nothing along the lines of "anyone who spends loads of money on full frame 35mm is a fool" or "questioning why 35mm owners don't just work a bit harder so they can afford MFD or...
  10. ondebanks

    Sensor size and Hyperfocal range (with the same lens)

    Hi Godfrey, Those are exactly the same points I made - glad to see we are in agreement. :salute: While as a physicist and observational astronomer, I will never dismiss the process of experimental verification, this truth also holds: well-established physics (like geometrical optics) does...
  11. ondebanks

    A H6D100 in my Hand

    I've always admired Hasselblad for that policy. Anyone who wants to apply a dark frame can take one in their own time and subtract it in software. Hasselblad hand choice and trust to the photographer: very enlightened. Phase One use the term "black frame" which we all take to mean "dark...
  12. ondebanks

    Sensor size and Hyperfocal range (with the same lens)

    That's not a good example for this thread, as you are talking about a different scenario - two different focal lengths. That is not physically possible. Please check my most recent post here. Ray
  13. ondebanks

    Sensor size and Hyperfocal range (with the same lens)

    However it also lets the circle of confusion change, and that is the real reason why the calculated DOF changes. If you enlarged both images by the same factor, clearly the DX print will be smaller than the FX print, but the DOF will be the same in both. That calculator is not based on equal...
  14. ondebanks

    Sensor size and Hyperfocal range (with the same lens)

    Hi Gerald, It doesn't matter what the pixel count is. Magnification in imaging is with respect to the physical image size projected onto the sensor, not how that sensor is subdivided into pixels. People just aren't as aware of this in the digital age because they don't see the captured image in...
  15. ondebanks

    110mm f2.8 LS Schneider Kreuznach lens for Phase XF

    The brochures are in error. Using the exact FOV formula for rectilinear lenses, for a 150mm lens, I get 25.3 degrees on the 60/80 MP Phase backs, and 26.2 degrees on 645 film. So they must be using 645 film as the reference dimension, not their larger digital backs. The same figures for a 110mm...
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