![]() I often think that aps-c is the sweet spot for these new cmos sensors. Where the real differences might be is correcting for full frame imx455. It's pretty easy to find scopes that correct for Aps-c. Nice to see other quality scopes out there. Very satisfying, contrasty images even from the city. No halos/bloat with that filter, or the Chroma 8nm H-alpha. I can also add that for narrowband this scope rocks! I was able to capture the faint Oiii “wings” on M 27 imaging from just outside Springfield, MA under bortle 7 skies with only just over 2hrs integration using a Chroma 3nm Oiii filter. The scope seems to not like the 350-400nm range too much, so having a “narrower” luminance and blue filter helps a lot with the blue bloat and It’s barely noticeable anymore. When I was working on the M 106 project with Pete_xl(who also convinced me to go with this scope), seeing his and our fellow collaborator Phillips results with those filters is what pushed me to buy them. There was definite blue bloat with those, what helped tremendously was switching to the Astronomik 元 luminance filter and “deep sky” RGB set. When I bought the scope I didn’t have much extra money left for filters so I went with the 2” ZWO LRGB set. If it's clear this weekend, I may try a consistent R-G-B-R-G-B sequence for a more fair comparison.Ī bit of blue bloat was something I had to deal with as well. There does seem to be some bloat in the blue channel. Take these with a grain of salt, as they are taken at different times of night, and thus altitudes. That said, I just pulled together the AberrationInspector plots for the red, green, and blue (left to right) images with the Photoline. Regarding chromatism, I was hesitant to do any kind of color analysis because I take the color channels at different altitudes, so the atmosphere would be an additional confounding factor. I'd have no problem showing those images (from either scope) at full size, even in the corners. The numbers show some eccentricity for both scopes, but it's down to the pixel-peeping level: more measured than seen. This setup has not been optimized for tilt. In this case the TOA130 was in Spain, where the skies are typically a lot better than here in PA, so if anything the TOA should have had an advantage. Yes, I think with average seeing, it seems likely that there aren't any meaningful differences. Could you compare or check in other colors than green? I‘ld imagine performance differences to show up better in the blue and red, especially spherochromatism. My TS Photoline shows some longitudinal CA, quite obvious when trying to manually focus with an OSC camera (but no more in the integrated images at a seeing >2.5“). When I look at the aberration inspector and Eccentricity plots, I do see more aberration from the Photoline - more than in my own sample. A few questions remain for me, maybe you can answer them?Ĭonsidering the seeing with 2.5“-3“ star size, do you think it was good enough to actually detect meaningful differences between the telescopes? Or would the point be that under average seeing, there are none? An additional channel to research it is to look up some of the images on astrobin taken with it-the masterful shots of pete_xl pushed me over the edge to buy it!Ĭharles, that is an excellent comparison. I hope my review is helpful for anyone considering this scope for astrophotography. Shipping from Germany was surprisingly cheap and fast, however US customs charged the wrong rate, so I'm trying to get that back. ![]() I won't be upgrading it, as it holds my full imaging train with OAG without issue. Fit and finish are excellent, and TS-Optics' version of this scope appears to be different from others with the FPL53 glass.The Gen2 version of the flattener has 55mm back focus with no adapters needed. They are expensive, but heavy duty and fit tightly to the focuser. Both the flattener and 0.8x reducer are excellent, with sharp stars to the edges and minimal vignetting (3% and 8%) with an APS-C sensor.I do not feel that a TOA130 would give me anything I'm not getting from this scope. This scope appears to be at least as good as the TOA130, though it's impossible to control for all variables, especially given that the images were taken at different sites.I provide a full review with analyses on my blog here. Additionally, I had some images taken with a Takahashi TOA130 that I could use for comparison. I've finally accumulated enough clear nights to write up a review of the TS-Optics Photoline 130 (2.5" focuser version) I bought in April.
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