I'm wondering if it's some sort of spectroscope. Cheers, Dave
> On Mar 8, 2019, at 7:01 PM, Bulent Celasun <[email protected]> wrote: > > MArk, Matthew, > > Thank you both for your interest and help. > I am pleased you also found this gadget intriguing. > > First, I must correct a typo for future generations who will look into > this case: >> I've found this tubular thing (9 - 22 cm in length, > It is 9-11 cm in length. > > Matthew, your suggestion looks very promising I should say. > The gadget is conceptually similar. It is just smaller. > Also the ends of the tube seems to be designed for human eyes > (consideration of viewing point). > The image is just a band of rainbow. > It may well be an "off axis guider" for another system. > Perhaps, a microscope! > I will look into this and if I find anything to satisfy our curiosity, > I'll share it. > > Thanks again, > > Bulent > > --------------------------------------------------------------------- > http://patoloji.gen.tr > http://celasun.wordpress.com/ > http://www.flickr.com/photos/bc_the_path/ > http://photo.net/photodb/user?user_id=2226822 > http://www.pentaxphotogallery.com/artists/bulentcelasun > > Matthew Hunt <[email protected]>, 7 Mar 2019 Per, 23:30 tarihinde şunu yazdı: >> >> The tiny prism makes me think of an off-axis guider for a telescope (the >> prism functions as a mirror, diverting some of the light near the edge of >> the field-of-view to an eyepiece or guide camera, while most of the light >> goes to the main camera). >> >> See: >> http://www.atscope.com.au/astrophoto.html >> Specifically, the section "Photographing Galaxies, Nebulae, Globular >> Clusters etc." >> >> On Thu, Mar 7, 2019 at 1:55 PM Bulent Celasun <[email protected]> >> wrote: >> >>> I've found this tubular thing (9 - 22 cm in length, about 2 cm in >>> diameter) in a thrift store. >>> >>> There is a single lens in each end. >>> >>> It has moveable parts like a mirror that rotates 360 degrees around >>> the tube. During part of this travel it faces an oval hole on tube's >>> wall where one can see a tiny prism inside which can intersect the >>> tubular axis by moving a lever from outside. >>> >>> Directing the gadget toward a light source and looking at from the >>> less populated end of the "tube" I see a typical rainbow. (Light >>> travelling from one end to the other crossing the prism inside). >>> >>> Moving the lever properly while light reflecting from the mirror >>> enters inside (and is reflected to cross the prism) makes two adjacent >>> rainbows visible at the far end of the tube. >>> >>> Oh well! I am not sure if I was able to describe it... >>> >>> Anyway, I ask just out of curiosty. >>> Has anyone ever seen something like this? >>> >>> https://www.flickr.com/photos/bc_the_path/sets/72157707409395914 >>> >>> Bulent >>> --------------------------------------------------------------------- >>> http://patoloji.gen.tr >>> http://celasun.wordpress.com/ >>> http://www.flickr.com/photos/bc_the_path/ >>> http://photo.net/photodb/user?user_id=2226822 >>> http://www.pentaxphotogallery.com/artists/bulentcelasun >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >>> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
