I suggest using the 2 second delay which gives mirror lockup. I often don't bother with this because my compound microscope weighs about 35 kg and is on a granite slab and anti-vibration mounts. Fitting an analyzer would be tricky with the camera in position, but the polarizer could go on the magnetic slide holder; sheets of cellophane as retarders would work well. A petri dish will probably give very interesting figures and may be a good retardation plate itself. Grow your crystals in a dish. This should go off list I think; it has little to do with Pentax.
Don Toine wrote: > 4x and 10x are my favorites and I allways wanted to try a reversed > microscope for observing pond flora and fauna without a cover glass. > And now I can do this in the field. When I receive it I will post some > pictures. Snow and ice next winter could be fun also. I hope I can fix > polarizing filters and halfwave plates on the trekker. > Toine > > On 8/23/06, Don Williams <[EMAIL PROTECTED]> wrote: > >> There's quite a difference. If you have a 4X on one of your compound >> microscopes you'll appreciate what you'll be getting from the new one. >> Also the visual optical path goes through the slide, not the cover slip. >> But the Trekker has a very good depth of field anyway. What might be >> interesting is small plastic petri dishes of pond water. Glass dishes >> have wavy glass bottoms, but the plastic ones are nice and flat and >> optically quite good. Plastic cells culture flasks are even better -- if >> you can lay your hands on some. >> >> Don >> >> Toine wrote: >> >>> Yes I have several lomo's (dark field, phase contrast etc). I plan to >>> use the Trekker in the field with the kids. If the image quality is >>> ok, microphotography in the field would be very big fun. >>> >>> On 8/23/06, Don Williams <[EMAIL PROTECTED]> wrote: >>> >>> >>>> Hi Toine, >>>> >>>> Have you used microscopes before? >>>> >>>> Don >>>> >>>> Toine wrote: >>>> >>>> >>>>> Don, >>>>> That's an interesting microscope. I ordered one, including the camera >>>>> adapter. Thanks for the tip! >>>>> Toine >>>>> >>>>> On 8/21/06, Don Williams <[EMAIL PROTECTED]> wrote: >>>>> >>>>> >>>>> >>>>>> There is a small microscope with a camera adapter available that will be >>>>>> easier to use and less cumbersome that a couple of big lens. It has a >>>>>> built-in light source and is not expensive. It's called the 'Trekker' >>>>>> and you can find it here: >>>>>> >>>>>> www.looksmall.com >>>>>> >>>>>> You can also find them on eBay for a lot less. I don't know what the >>>>>> camera fitting is like but I've been thinking about getting one for some >>>>>> time. It would be perfect for snow crystals, you'd be able to use it >>>>>> outside with very little messing about. If you're interested I can ask >>>>>> some of my colleagues who have them. I've seen pictures taken with this >>>>>> little thing -- not bad at all. There must be reviews on the web. >>>>>> >>>>>> Don >>>>>> >>>>>> [EMAIL PROTECTED] wrote: >>>>>> >>>>>> >>>>>> >>>>>>> In a message dated 8/20/2006 4:56:54 AM Pacific Daylight Time, >>>>>>> [EMAIL PROTECTED] writes: >>>>>>> Still, I'm happy with it because it is a first proof of concept for a >>>>>>> range of macro subjects I have not dared to explore until now, after >>>>>>> my success with the snow crystals last winter. >>>>>>> >>>>>>> Plankton is usually reserved for microscopy photography in labs. One >>>>>>> has to collect samples in the field and study them back home. My goal >>>>>>> was to be able to shoot them on location, using ordinary photographic >>>>>>> equipment. >>>>>>> >>>>>>> http://www.oksne.net/paw/sidacrystallina.html >>>>>>> >>>>>>> Next stage will be to explore lighting techniques. :-) >>>>>>> >>>>>>> Thanks for looking. >>>>>>> >>>>>>> Jostein >>>>>>> ======= >>>>>>> Impressive, Jostein, even with graininess. >>>>>>> >>>>>>> Marnie aka Doe :-) >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> -- >>>>>> Dr E D F Williams >>>>>> www.kolumbus.fi/mimosa/ >>>>>> http://personal.inet.fi/cool/don.williams/ >>>>>> 41660 TOIVAKKA – Finland - +358400706616 >>>>>> >>>>>> >>>>>> -- >>>>>> PDML Pentax-Discuss Mail List >>>>>> PDML@pdml.net >>>>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>>>>> >>>>>> >>>>>> >>>>>> >>>> -- >>>> Dr E D F Williams >>>> www.kolumbus.fi/mimosa/ >>>> http://personal.inet.fi/cool/don.williams/ >>>> 41660 TOIVAKKA – Finland - +358400706616 >>>> >>>> >>>> -- >>>> PDML Pentax-Discuss Mail List >>>> PDML@pdml.net >>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>>> >>>> >>>> >>> >> -- >> Dr E D F Williams >> www.kolumbus.fi/mimosa/ >> http://personal.inet.fi/cool/don.williams/ >> 41660 TOIVAKKA – Finland - +358400706616 >> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> >> > > -- Dr E D F Williams www.kolumbus.fi/mimosa/ http://personal.inet.fi/cool/don.williams/ 41660 TOIVAKKA – Finland - +358400706616 -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
