Meade Model 2045
Posted 05 June 2007 - 02:47 AM
Always wondered if it was just my telescope that was a lemon, or if the entire model line was bad stuff. It's a georgeous little instrument, and I would love to have one that worked.
Posted 05 June 2007 - 09:06 AM
FWIW, I would say my 2045 has very good optics. I can recall seeing a textbook diffraction pattern through this telescope. The first diffraction ring was quite prominent due to the scope' large central obstruction (about 40%). One thing that I was impressed about this scope was the complete lack of image shift during focusing. I didn't appreciate this attribute until I moved to a larger SCT.
Although this scope's optical correction is good, its large central obstruction and its lack of high transmission coatings mean the image tends to be dim and lack that crisp quality. I would surmise that this scope would give images on par with a 3" refractor based on my testing with my 3" f/16 Unitron refractor.
Even though I had a numerous chance to let this scope go, I always managed to hold onto it out of sentimentality. For many years, I used this telescope on a large picnic bench with the table top tripod legs. And for that, it was perfect as a grab and go. Even now I take it out of its case from time to time and enjoy the "vintage" views.
Posted 05 June 2007 - 09:33 AM
See page 87 on.
I have a near mint 2045D.
It is mechanically superior and optically very good. The "D" model has the multi-coated optics group and the images are fairly bright. I like the benefit of f10 optics on a 4inch SCT with it's wider field than the 90mm Mak as well as all the SCT accessories. It's a beauty all right, in a very nice portable size but as with all SCT's go all out to collimate perfectly at very high power, an in-focus star image to get the sharpest image.
Posted 05 June 2007 - 10:04 AM
Posted 05 June 2007 - 08:38 PM
Posted 05 June 2007 - 09:34 PM
However I think my Unitron 3 inch clear aperature yields superior views. Bonco
Me too.....don't want to admit it. I think if Questar is 1/8 wave, then 2045 may be 1/4 or 1/3 wave ? Still very good but not in the superb category.
Posted 05 June 2007 - 09:52 PM
Thanks for the link great info available there. Awesome !!