The aperture was 3.5 on that photo. I suspect the aperture blades are the cause for the spikes. Even without the astrotracer it's very funny to watch jupiter and it's moons on the cam in zoomed live view.
The idea I now have a complete telescope in my camera bag is amazing. Even with a 50 mm I can see more detail on the pictures compared to visual viewing with my cheap meade telescope. Next step is indeed astrostacking. I have seen some samples with very accurate tracking. maybe we need to remove all metal and electronic equipment around the camera (wooden tripod and a greater distance from the car) for good calibration. Toine On Wed, Oct 26, 2011 at 11:26 PM, Darren Addy <[email protected]> wrote: > Thanks for sharing these. It is indeed an amazing and ground-breaking > technology. > > I was taken back, a bit, by the diffraction spikes on the close-up of > Jupiter. One doesn't expect diffraction spikes on what is essentially > a "refractor" system. A bit of googling on the subject came up with > this explanation, however (which I was not aware of): > > "...some are the result of the microlenses on many modern CCD's. These > typically give smaller spikes than the normal ones from obstructions, but > are plainly visible on brighter stars. As such, you then have the decision > of whether to process and remove these, or leave them." > > Darren Addy > Kearney, Nebraska > > -- > 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.
