Quote:
Originally Posted by Stephen65
I have a 5" triplet APO (FLT-132) and it takes no more than an hour to settle.
FPL-51 is cheaper than FPL-53.
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I've been looking for a larger aperture refractor to upgrade from my ED80, for imaging with a DSLR-size sensor. The FLT132 looks like a great instrument but it really is beyond my price range.
So basically I've been comparing the William Optics FLT110 to the Prostar 127ED. They both cost about the same, $3100. The FLT110 has smaller aperture but boasts much higher quality. There is a field flattener designed specifically for the FLT110, no field flattener for the 127ED as far as I can determine. The FLT110 was looking like a sure thing.
Now, along comes this 127mm triplet APO for USD810.... The choice is no longer clear!
Gotta check the field flatness of the 127ED!
Cheers,
Rob