iso rivolta

Lives in Neutral Zone Neutral Zone
Joined on Jan 20, 2007

iso rivolta's recent activity

  • This is a nice demonstration of UVIVF (UV induced visible fluorescence), but for UV photography you need a (modified) camera without the UV-cut filter on the sensor, lenses with good UV ...
  • More light reaching the photodiodes, no filtering, and no noise reduction in K3 III Monochrome means more details, especially at high sensitivities. I wonder if ISO calibration is also different, ...
  • Created discussion thread Wild Crocus flavus
    Finally, this February I had the opportunity to test in the wild my new Vivitar Series 1 90mm f2.5 macro lens (with PK mount). I've seen the bright yellow Crocus flavus flowers in a forest parallel ...
  • There should be no difference to aligning along the longitudinal axis of the lens, as the sensor is only moving perpendicular to that. And anyway, the fine tuning would be done on a tripod, when ...
  • Truth is that Canon DSLRs are missing this too and the Nikon auto tuning  system has a lot of room for improvement. Let's see if Pentax is able to do a better version now that the big players are ...
  • This has nothing to do with the Pentax DSLR forum. The first film camera camera to be announced it's not even a film SLR and is not using K-mount. To me this is a disapointing product from Ricoh ...
  • The most recent Nikon DSLRs have this. Look under Auto AF Fine-Tuning: https://onlinemanual.nikonimglib.com/d780/en/14_menu_guide_06_10.html A dpreview article on the matter: https://m.dpreview.com ...
  • What about a strong (but thin) double adhesive tape? I'm using this as the first option when the rubber of the focus ring is separating in vintage lenses. If this is not adhering to the metal ...
  • More likely the framing using the OVF framelines becomes too inaccurate if IBIS is working at its maximum?

  • Thank you for the analysis. I'd like to understand why the K-3 III Monochrome is different from all previous Pentaxes. The sensor itself should be the same as in K-3 III. Is autoexposure or ...
  • No, the Sony SLT cameras had EVF and a translucent mirror to direct a part of the light towards an AF sensor module. The only hybrid viewfinders I know of are those in Fuji's X-Pro and X100 series, ...
  • Depends on how good such a combined system can be made: if it's worse than both a pentaprism OVF and a good current EVF, is it worth introducing? I think that such risks are better avoided at this ...
  • Basic information for consumers that bought entry level DSLRs. They are lured by mentioning the performance of halo products - high speed mirrorless cameras, and their advantages compared to DSLRs. ...
  • It will have been interesting to see a test of the AF-point linked stabilization. I only found one discussion about it, someone reporting it's not working properly with eye-AF and the 40mm f2 lens:...

  • Replied in Pentaprism
    These were created in 2021 to celebrate the release of the K3III, known to include a special glass prism. I'm not sure if these present prisms are actually made from the same glass and if they're ...
  • Strange, indeed. The cameras that behave similar to this (shortest exposure time unavailable at large apertures) are those with central (leaf) shutters, such as compacts. E.g., some digital compact...

  • If the aperture is closing and opening between shots (not likely at 120 fps), a perceivable noise would still be produced with some lenses.

  • A9 III is not solving the progressive display on the EVF. https://m.dpreview.com/articles/9503458063/sony-a9-iii-what-you-need-to-know
    "Interestingly, because the viewfinder and rear screen are...

  • Hi Mike, From my experience, you can adjust WB for UVIF images by using a piece of paper that fluoresces white under your chosen illumination. Meaning you perceive it as white or almost white. This ...
  • Probably it's about redundancy. People that have the Z6 II or the next Z6 III will buy this one just for looks and the retro experience, not out of necessity.

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