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  1. pcrichmond
    01-31-2018
    pcrichmond
    Greetings stemked. Thanks again for your post on UV and digital, sorry if it got hijacked.
    A few items that didn't get mentioned:
    Custom white balance is critical, ptfe (white teflon) works well.
    Live view for focus & framing. Especially with the pinhole.
    Some speedlights emit UV if the plastic lenses are removed and bare bulb is exposed. Can help if needed. Care the light isn't pointed into anyhtings eyesight.

    Not sure why but my eyes start to hurt when working in LV and UV for extended periods of time. I don't see how any radiation can be transmitted via LV but wonder if our systems inherently know these bandwidths are hazardous and react accordingly when the visible spectrum is blocked out. Just a heads up for your student.

    Would love to hear how your students project progresses. A combined botany/physics lesson would be wonderful. Again, if you would like to use my converted K01, let me know - we could work something out.
    Best of luck with the project,
    Paul R.

About Me

  • About stemked
    Country
    United States
    Location
    Indianapolis
    Pentax Cameras
    K-3, K-5 IIs, K-7, K10D, Q7, Pentax Film SLRs
    Photographic Equipment
    bodies: K1000, ZX-5n,, MZ-S, Super Programs, LX, P30T, 6x7, ES, K10D
    Lenses: TMTC(~30 K and screw mount lenses, 3 6X7)
    Equipment: Full film equipment, some Digital
    About Me
    Moderator Pentax forum at Photo.net
    Microbiology Professor
    30 year Pentax user
    Special Photography Interests: Nature and Scientific Photography

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  • Last Activity: 02-05-2019
  • Join Date: 02-19-2009
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stemked has received a total of 64 Likes | View All of stemked's Liked Posts | View Posts stemked Likes

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Nature Snow Geese storm Post Your Photos! reh321 7 317 01-02-2019 10:00 PM
Nature Indiana Fall Spectacular Post Your Photos! stemked 8 342 01-05-2019 06:40 PM
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Wanted: Lens hood shade for Pentax FA 80-200mm Wanted Items vonBaloney 2 37 01-06-2019 12:08 PM
Autofocus issue with 80-200mm FA f2.8 Pentax SLR Lens Discussion stemked 5 372 12-01-2018 05:49 AM
Next year (2019) Pentax will be 1 Century old! General Photography Des 9 1034 12-08-2018 03:51 PM
Recommendations for a QR Plate for Pentax FA 80-200mm f2.8 Pentax Camera and Field Accessories angerdan 8 511 11-27-2018 03:29 PM
Wood Duck Fall Indiana Monthly Photo Contests stemked 1 54 11-08-2018 09:26 PM
Are the Pentax 135mm K f2.5 and Takumar 135mm f2.5 6... Pentax SLR Lens Discussion VoiceOfReason 9 853 09-27-2018 08:46 PM
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