> On 16/01/2025 21:25 GMT Bob W PDML <pdm...@icloud.com> wrote: > > > Atrocity alert! (But not on a Cotty scale). > > I thought I should check that the advice below was sound, so I attached an > M42 Schneider 50mm lens to Pentax K tubes 2+3 by way of a M42-PK adapter, > then used a PK-LM adapter to attach the tubes to my Leica M10 monochrom, > since it’s the only full-frame digital camera I have, and took this picture > of the top of an apple. > > This is the full 35mm-sized frame, the apple is medium-sized, so the stalk > thing at the top* is about 1cm diameter. > > https://share.icloud.com/photos/005Xj8RmZKnKBrfaWOdmnnFLw > > *any botanists in the room may tell us its proper name.
Where to begin? I had to go and look at the pic, because I have never seen an apple with a stalk (pedicel - the bit that attaches it to the tree) 1cm in diameter. The apple would have to be about 50cm in diameter for that to be true. What is visible in the picture is the remnants of the flower before the apple formed. The petals have fallen and the curly, crispy things are the five sepals from the base of the flower. There will be the withered remnants of the other reproductive organs, the style and stamens, in there somewhere. All at the opposite end of the fruit (pome) from the stalk. Here endeth the botanical anatomy lesson. Amen. > > > > > On 16 Jan 2025, at 15:34, Bob W PDML <pdm...@icloud.com> wrote: > > > > I seem to be missing posts. They’re not even in my junk folder, which is > > where most of the PDML goes for some reason. > > > > Anyway, I have a pdf copy of the Pentax extension tubes manual which I > > found online somewhere, and which is probably still available. It includes > > charts and so on about what you need to photograph things at what scale. > > > > Try a 50mm lens with tubes 2+3. That should give you more or less 1:1 > > magnification of a 24x36mm area (ie 35mm negative) with film-subject > > distance of 204mm and an exposure factor of x3.8. The rest you can crop. > > This worked for me when I was playing around with copying slides. > > > > But since you have all the gear, and presumably a digital camera, it should > > be easy enough to find out by trial and error. > > > >> On 16 Jan 2025, at 15:08, John Sessoms <sesso...@earthlink.net> wrote: > >> > >> I would probably use a telephoto at closest focus & then crop a lot ... > >> > >> IN FACT, I just remembered doing that once before ... > >> > >> Thanks. > >> > >>>> On 1/15/2025 6:42 AM, Ralf R Radermacher wrote: > >>> I'm hopeless at tabletop photography and I already get the willies when I > >>> need to take photos for selling stuff on ebay. Might explain why I never > >>> bothered to get a macro lens. > >>> So, how do a take a photo of something about 1 centimeter square without > >>> a macro lens? > >>> I have SMC-M or SMC-A lenses with 20, 24, 35, 50, 85, 135 and 200 mm, a > >>> set of extension tubes, and zooms 10-20, 18-135 and 55-300 mm. > >>> Ralf -- %(real_name)s Pentax-Discuss Mail List To unsubscribe send an email to pdml-le...@pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
