Question: When shooting with a flat field lens (APS-sized camera angle of view), The stars flow in the four corners. (Coma aberration)
When a flat field lens is used, the surrounding image flows radially, and the star image changes. Not good enough. In terms of price, I feel like I've done my best, but kind of disappointing.
Our developer wonders if it is the reduced focus function that introduces this question, but the results showed it is not after the factory used a flattener to try again. It is just this scope's limit. If the 70ED is matched with a large chip, A possible way is:
The SV193 increases the field of view of the shot, which is sufficient for most DSOs. The stacked image edges may need to be cropped in the post-process to improve image quality.
SV503 70ED： Multi-function OTA: suitable for shooting sun and moon, landscape scenery, deep space photography (works better with 1/2 or 1/3 inch sensor, the pixel size in 3μm-5μm, and need to match the SV193).
So if you are expecting the SV503 70ED, you need to look at this article.