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  1. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    Interesting feedback, I only used CS4 for joining maybe 3 at a time... it was flawless, but as you say, its not a dedicated stitcher, so I am sure the other programs offer more in this regard... I...
  2. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    > Personally, I think both MFD and 8x10 aren't what you want for ultra-large prints of immobile subjects. Get a GigaPan with a small DSLR, and make 3 gigapixel captures. Nothing else can come close....
  3. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    Jim, remember, native pixel count does not equal recorded resolution.... which is function of the sensors MTF and the lenses aerial resolution. In this case, since you are still forced to use a LF...
  4. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    > But I also disagree with the assumption that people don't or shouldn't move up on the image.


    Agreed.... in todays world, everything is scrutinized to death... and...
  5. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    The problem with MF digi back with LF is.... aerial resolutions of 810 lens are very poor vs. MF lenses. You also are contending with very large capture angles once you leave the center of the...
  6. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    > Are you trying to be funny? 10" is not a reasonable viewing distance for a 6.25 x 5' print. Neither is 20". Reasonable is 60".



    If everyone viewed prints at their...
  7. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    what version PS has a poor stitching operation? I found CS4 very effective?
  8. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    > An Epson flatbed scanner will give you about 10,000 pixels from the long dimensions of 4x5 at the limit of its capability


    You are dealing with marketing...
  9. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    out of curiosity, why such problems stitching a few P1 MF shots together?
  10. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    > On one hand, many 4x5 shooters on here seem to complain about 8x10 DOF. On the other hand, most fine art photographers seem to like the DOF and tonality of 8x10.


    ...
  11. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    > Such as a 60x75" print at any reasonable distance


    gotta work out the numbers....

    10 lp/mm on the print, add in some efficiency losses in the printing process,...
  12. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    > To summarize, the majority opinion was that inkjets are the sharpest print medium currently available. So it's not just QT who thinks this.


    In digital,...
  13. Re: Format for 60x75 inch Gallery Prints - 4x5 or 8x10?

    It seems hard to fathom, if your subject matter can handle 4 second exposures, then its pretty damn still.... in which case, why mess with all this large gear, stitch, stitch, stitch....

    As for...
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    Re: How accurate are exposure meters? Not very....

    Dan two meters that don't agree with each other when calibrated, is a recipe for bad exposure. Of course, you did not mention how far off they were, a critical issue....

    My "TRUE" failure rate,...
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    Re: How accurate are exposure meters? Not very....

    810 stereo
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    Re: How accurate are exposure meters? Not very....

    > Um, Bill, you're the one who insists on absurd levels of precision.

    Yeah, I hear Dan, I'm insane to correct potential 1.3 stop exposure errors when exposing dual 810...
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    Re: How accurate are exposure meters? Not very....

    The previous "2" pages addressed your concept ad nauseam.

    I have come to the conclusion, no one reads a thread before posting :-)
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    Re: How accurate are exposure meters? Not very....

    Agreed with your math Dan, this was a simple explanation of transmission losses.... somehow we go from, this entire thread is absurd, and no on needs this level of accuracy...... then to expressing...
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    Re: How accurate are exposure meters? Not very....

    > something that merges the science with real usefull application guidance. I hope that is where this thread ends up; it's not an easy thing to do I would imagine!


    ...
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    Re: How accurate are exposure meters? Not very....

    >You should always test your exposure meter in connection with your actual experience using the equipment you have. There are so many variables---exposure meter, fil, lens settings, etc.---which can...
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    retro focus lens in ~120mm fl range

    Is anyone aware of a retro focus lens (longer back focal length vs. the lenses nominal fl) in the 120mm fl range?
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    Re: How accurate are exposure meters? Not very....

    > Killer app for an iTouch, iPhone (or my Blackberry Storm) for a LF photographer: a $9.99 download that matches the camera phone's spectral and DR response to various film types, and displays a...
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    Re: How accurate are exposure meters? Not very....

    > Interesting to see the variables in meters but highly impractical to worry about in real world shooting.


    I would strongly disagree with this assertion. The thread...
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    Re: How accurate are exposure meters? Not very....

    >What an advanced Nikon camera contains is basically a tricolor meter with a lot of fancy probability software. It doesn't replicate the role of a spectrophotometer whatsoever.


    ...
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    Re: How accurate are exposure meters? Not very....

    > Exactly what the DSLR Matrix metering algorithms are doing with that information after the fact is perhaps different in digital than what the film camera ones do. The F5 algorithms seem to get...
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    Re: How accurate are exposure meters? Not very....

    >You'd need to develop three parallel spectro programs fed off a beamsplitter, then come way to calibrate each channel. Last time I talked to an engineering co capable of this they thought it would...
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    Re: How accurate are exposure meters? Not very....

    Ivan, thanks for being the voice of reason here. You are soo right, the goal is, to improve our chances of success in tricky lighting conditions when shooting expensive sheet film. While Drew is...
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    Re: How accurate are exposure meters? Not very....

    Interesting Rob......well, maybe this might be a smarter buy than a Sekonic Color meter... if you put a diffuser over the lens, it may serve as the ultimate incident meter.... It seems the new soon...
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    Re: How accurate are exposure meters? Not very....

    Ivan, very interesting, what DSLR Nikon models have the RGB metering?
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    Re: How accurate are exposure meters? Not very....

    Ivan, that is actually a good idea..... potentially beater F5's may have a 2nd life after film :-) hmmmm........
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    Re: How accurate are exposure meters? Not very....

    > If all you're saying is they're all different, ok, point proven, they're all different including the Gossen. It still doesn't establish which if any are accurate and over what light conditions.
    ...
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    Re: How accurate are exposure meters? Not very....

    Hi Brian, thanks for the clarification..... since the Adams days, the K factor term has been more commonly called "meter reflectance factor"... but I could be wrong.... I rarely see the K factor term...
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    Re: How accurate are exposure meters? Not very....

    > Color temp has little to do with it,


    HUH? Color temp has everything to do with it.... did you see the results at near daylight vs. 9k, as I explained in my...
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    Re: How accurate are exposure meters? Not very....

    > unless you are doing copy work, "accuracy" may be a subjective determination.


    The first step in proper exposure is to get an accurate light meter reading.... if your...
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    Re: How accurate are exposure meters? Not very....

    > but if I know how to program and work with something like this I damn well understand what I'm talking about with a handheld meter.


    Drew, what you have...
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    Re: How accurate are exposure meters? Not very....

    > Bill there's ample evidence that many meters are delivered off calibration.
    And I've never got a iused meter that was trustworthy.


    The 608 was sent in for...
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    Re: How accurate are exposure meters? Not very....

    .

    Thanks for being the "voice of reason" Jim, yep, that's the sensible conclusion to draw from this....or at least be aware of such.

    Of course if you shoot neg film , you have greater exposure...
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    Re: How accurate are exposure meters? Not very....

    > What did you expect to learn from your test?


    It's called "confirmation" Percepts.... get it? I was confirming my suspicion. Or maybe the sensible position...
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    Re: How accurate are exposure meters? Not very....

    too much scientific analysis ruins the fun for me. Perhaps I should have taken the "don't bother reading" option offered in the OP


    yep, you got that right..... hence why I...
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    Re: How accurate are exposure meters? Not very....

    > You did not even maintain a constant change in EV - the figures are jumping all over the place, at a much greater magnitude than the change in K. For a clean test, only the tested parameter would...
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