| Globular Star Clusters |
| For the first time, I've started working on some clusters with the newt. The first image shown below is a cropped portion of a photo of the globular M3 taken with the SXV-H9, TT color wheel/Astronomik filters on the 10in/f4.8 newt. The exposure info is lum 12X180sec (unbinned), 12X60sec RG and 13X65sec B (RGB bin 2X2). The newt uses a double circular spider to avoid diffraction spikes, but unfortunately, this leads to the diffracted light forming a figure 8, and ultimately an oval around bright stars, not such a good idea. I didn't use the coma corrector on the subs for this exposures, some coma is evident, I'll use it next time. (click on the image for a wider field version) |
| The photo below is from a crop of the globular cluster M53, taken with the H9/TT CW/LRGB filters through the SPX250/4.8. Exposure info: lum 5X300s (1X1); RG 7X120s,B 8X125s (color bin 2X2) (click on photo for wide version) |
