Explore Forums Discussions Photo Topics Outdoor Photography Topics Astrophotogaphy with 35mm Film Camera

Viewing 3 reply threads

Astrophotogaphy with 35mm Film Camera

  • Author
    Posts
    • Tricky Dicky
      Participant
      Post count: 4

      Hi Everybody,

      I am thinking of resurrecting my old Ricoh KR5 film camera to try and take some astro photos, I only have 800 ISO film left (very old).

      What I would like to ascertain is which rule 4oo, 500 or 600 would be the best. I will be using a prime 55mm f2.2, manual focus lens on the camera.

      Any suggestions would be greatly appreciated.

      Thanks.

      Dick.

    • Peter Connan
      Participant
      Post count: 818

      Hi Dick

      Sorry to be the bearer of bad tidings

      To get pin-point stars with that lens, your shutter speed should be around 10 seconds maximum. Correct exposure at such a short shutter speed and f2.2 would require an ISO close to 9 000.

      Thus really your only bet is to do star trails. Try an hour at f5.6 and ISO800 or half an hour at f4.0?

    • Tricky Dicky
      Participant
      Post count: 4

      Dear Peter,

      Thanks for the advice, I will try Star Trails.

      Just for my info, how did you come to the figure of about 9000 ISO. I understand the calculation of the 10 seconds, as for the ISO, I have not come across any calculation as yet.

      Thanks.

      Dick.

    • Peter Connan
      Participant
      Post count: 818

      Hi Dick

      In my limited experience, you need a combined exposure of around 7.3EV.

      I developed myself a little spreadsheet which works out this and several other factors, so that I don’t have to do all the calculations by hand each time. If you want, I could mail it to you.

      • Tricky Dicky
        Participant
        Post count: 4

        Hi Peter,

        Sorry for not coming back to you sooner, I was out of contact for a while.

        Yes, I would be interested in your spread sheet. My email address is:

        [email protected]

        Thanks,

        Dick.

Viewing 3 reply threads

You must be logged in to reply to this topic.Log In