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Post by Ales - iStar Optical on Feb 6, 2021 14:23:46 GMT -5
Another customer from Singapore purchased our newly produced 140 F/6.5 APO triplet and installed the lens in his own OTA. See first test images attached. I asked Robin to keep in touch and post more images both on Istar Scope Club and Cloudy Nights. Attachments:
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qqbin
New Member
Posts: 1
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Post by qqbin on Feb 7, 2021 10:31:43 GMT -5
Ales As promised these are some additional test done with this lens. It is a wonderful lens with no CA. I’m on Bortle 9 sky thus testing RGB is quite limited but so far it has perform very well. I do have some oval stars on the image but need to further isolate it whether it is because of the flattener or the tilt on the scope. This orion image stats: RGB: 60s x 10 using astronomics RGB filters Ha: 180s x 10 using chroma 3nm Ha filter Taken using QHY600M Another image is Rosette Nebula, 3x600s each of Chroma 3nm SHO filters |
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Post by GrahamP on Feb 8, 2021 4:17:15 GMT -5
Wonderful!
Thanks Robin....Graham.P
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Post by Ales - iStar Optical on Feb 8, 2021 13:51:03 GMT -5
Very nice, aftger the tilt issue is resolved this ISTAR 140 F/6.5 APO triplet will perform flawlessly.
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