SEARS /TASCO VS UNITRON
Posted 17 May 2007 - 09:22 PM
If you would be so kind. I would like opinion of the Sears 75mm f/15 in comparison to other scopes of it day.
Posted 17 May 2007 - 09:33 PM
Posted 17 May 2007 - 09:40 PM
Posted 17 May 2007 - 09:45 PM
You have some really beautiful looking scopes there. And I can appreciate all the hours of hard work you put into them. They are spectacular!
Posted 17 May 2007 - 09:46 PM
You live in a beautiful part of the country.... 20 years ago, I used to drive past the delaware water gap and then north to upstate new york often.
Btw....I just got a Polarex/Unitron 75 and between my Tasco 15TE and a Towa 80mm, optically I'd go along with Lenny and some others and guess it's pretty close all around. It would take some time to really crank it through a set of tests. Mechanics are definitely more substantial on the Unitron but the Towa ota is pretty close...not the mount however. To get it even optically though, I had to flock esp. my Tasco and to a lesser degree the Towa to get the contrast up to the stock Unitron. That goes for the 60mm too. Tasco 7TE-5 needs the drawtube flocked before it can deliver the kind of contrast that stock Unitron 60mm delivers. Afterwards though I might give the 7TE-5 a slight edge with it's longer f ratio.
Posted 18 May 2007 - 07:00 AM
It's SHAD FISHING time in the Delaware.May have to make a trip with my son to the Milford bridge.after the weather clears.Maybe I should bring a scope just in case the fish don't bite ?
Posted 18 May 2007 - 07:44 AM
It's all about having fun with this hobby, huh!!!
Life don't get any better than this!!!
Posted 18 May 2007 - 08:09 AM
I had to flock esp. my Tasco and to a lesser degree the Towa to get the contrast up to the stock Unitron. That goes for the 60mm too. Tasco 7TE-5 needs the drawtube flocked before it can deliver the kind of contrast that stock Unitron 60mm delivers. Afterwards though I might give the 7TE-5 a slight edge with it's longer f ratio.
I'm currently working on a 7TE-5 as well. What are you going to use to flock the scope?
Posted 18 May 2007 - 08:19 AM
Hey I am working on one of these to! I like the plastic ring spacer they used in the objective. Cool
Posted 18 May 2007 - 08:26 AM
I would use tar and feathers and ride it out of town on a rail, (Crow feathers work the best)
That explains everything! I was using chicken feathers!
Posted 18 May 2007 - 12:23 PM
Well, next time I'll try feathers dipped in tar....
Actually, what I did was cut flock paper from protostar or equivalent and roll it to perfect diameter and right length, unscrew the eyepiece holder and slide it in to the focusing tube. I can actually use the same one and move it from the 7TE-5 to the 10TE/15TE as they use the same focuser. It's really a huge improvement as most of the glare is in the focuser as whatever paint they used got older and shiny.
If you really want, you can do the same thing for the rest of the tube. I only do it where you see some glare looking through the focusing end at a bright light source.
As an added trick sometimes I cut off the paper backing a tiny amount at the ends only and have that stick. I just found it too messy to try to get it to stick all the way easily so I leave the paper on. However,for the Tasco focuser, thinner is better if you are trying to take advantage of the maximum fov using 1.25 30+mm eyepieces.
Btw, I tried flat paint but it wasn't working as well and it gets tricky.
Hope this helps.
Posted 18 May 2007 - 06:54 PM
I think all of these scopes are pretty good.
Posted 18 May 2007 - 08:24 PM
I believe the majority of Japanese scopes of the era due to the manufactureres unrelenting quality control were amazing. I agree and trust John Siple's expert opinions and overall comment about the quality of Tasco and Sears scopes over the years ( hats off to John and his articles, as his research and ability to source infomation has not only assisted the hobby overall, he has also spurred the continued interest in the preservation of these classic scopes). Lenny I believe has also been able to compare optical performances.
My own experience is that I have been fortunate to have ownerhip of 3 Astro Optical Ind Co,. Ltd scopes; the 80mm 76mm and a 60mm f20. Recently I also have been able to take ownership of a 75mm and 60 mm Unitron. Although I do not consider myself a collector, I use each scope for a particular purpose. The Unitrons I bought as I wanted to know for myself what the talk was all about
All the Astro..' scopes are amazing optically and mechanically. Optically images are tack sharp and absolute minumum colour on high mag' and no sphericity as far as I can discern. Resolution on all is amazing as I can see detail that one is supposed to see with larger scopes.
In terms of overall mechanics and user friendliness, the Unitrons are better, (mounts, focussers, tolerances) and more portable (lighter ). The Astro's however beat the Unitrons in terms of Optical performance although the 60mm F15 Unitron comes close to the 60mm F20 Astro
I don't know if one can in fact properly compare. Overall I would say that both Astro optical and Unitron complement what the other lacks. However its what you make of the hobby and what fundamentally pleases you ...I for one and my family and friends, that have used all so far, have enjoyed them.
Posted 19 May 2007 - 01:40 AM
Posted 19 May 2007 - 09:40 AM
Total chance some lady gave it to me She would not take any money for it WOW!!!
I hope you offered to mow her lawn for the next few decades.
Posted 19 May 2007 - 10:09 AM
Posted 20 May 2007 - 09:14 AM
See, I had both so I can make a judgement as I did yesterday in another thread. A friend of mine has a Carton refractor. I will be looking at his when I get together at his place for a summper star party at his place. My Unitron is going there too, so it'll be a great side/by/side comparison of optics, mounts, etc. That particular star party thread is ongoing via this thread BEOTS (Buckeye On The Sky) star party in Lodi, Ohio.
Lenny; Id like you to take a look at my 90mm f16.6 Parallax while your at it.Think you could do that???.
Posted 21 May 2007 - 12:23 AM
Can you post a picture of your Parallax - I am wondering if it is the one of the 90mm scopes John Siple has been searching for.
Posted 21 May 2007 - 07:08 AM
Posted 21 May 2007 - 07:10 AM
Oh and its a 90mm f/16.6
Posted 22 May 2007 - 06:42 AM
I have never seen one like this!!
Can you post more