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 Replies: 21 / Views: 4,510 |
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Valued Member
United Kingdom
126 Posts |
The skip was getting filled by my Dads stuff but I rescued his old Tasco 4.5" wide field scope. Am going to make a total mess of it but am going to attempt to attach it to the Cannon EOS 1100D as they are both really old and if I fail then so what. Am guessing I have to move its Primary mirror up the tube to Prime focus on the Canons CCD which is deep inside it. I took the Primary out and cleaned it as it was really contaminated. Opposite of a Coin Imager! Sue  |
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Valued Member
Canada
234 Posts |
Cool telescope. What is the f-number? What is the eyepiece size? 0.96" or 1 1/4"?
For sure I do not recommand to move the primary mirror. The actual position is optimized for this telescope. If you change the distance, the secondary mirror will not have the right size, and the optical beam will be clipped. So you will lost light intensity.
This telescope is not designed for photo. It's only for visual observation. You can maybe take some picutre of moon, but that's all.
If you still want to adapt your DSLR, you will need what we call a T-adaptor. Just google that term.
If the distance doesn't fit, probably we will need new focuser mechanism with d'horreur distance to adapt your DSLR.
But again, it's not the right instrument for astrophotography. You need a motorized mount to track stars movement.
Let me know if you have any questions.
Edited by SP67
04/23/2021 7:31 pm
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Valued Member
 United Kingdom
126 Posts |
@SP67. You have talked me down! I looked into it and it's not 1 1/4 " eyepiece so an adaptor would be likely impossible.
Sadly the old Canon takes amazing daylight images but when I coaxed it into taking a black image it has a bunch of dead pixels jammed full red blue green and I upgraded its firmware but it doesn't seem to have a function to mask them.
Yes it's a wide field only good for the Moon or I got a good look at the Nebula in Orion's Belt and see Jupiter with 4 tiny moons but it would be useless without a clock drive.
Took me ages to adjust the primary after removing for cleaning so will lick my wounds.
In truth Scotland is probably the worst place on the planet for Astronomers.
Ironically they are building a space port!
Sue
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Pillar of the Community
United States
7276 Posts |
Hi Sue, I do astrophotography, the advice above is correct. You really need a tracking mount and not every scope is good. This is one of my scopes.  These are some of my pictures      |
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Valued Member
United Kingdom
126 Posts |
The Moon is Fantastic and fast to image. But if am wrong the Monkey Head Nebula must have taken some serious preperation. Stunning
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Valued Member
United Kingdom
126 Posts |
The Moon is Fantastic and fast to image. I can get similar with my Huwaui P30 Pro phone! But if am wrong the Monkey Head Nebula must have taken some serious preperation. Stunning and probably freezing as your machine tracked it for God knows to expose.
Sue.
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Pillar of the Community
United States
7276 Posts |
Sue, the Monkey Head and Veil nebula took I believe 4 nights to do each. I automated my set-up so after setting up, automation takes care of everything, except clouds, those clouds still get in the way.
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Valued Member
Canada
234 Posts |
@hfjacinto, wow nice setup and really good pictures. Impressive. My dream to get such equipments. In the short term, I'm happy to hear that I'm not the only crazy guy spending all free time over an eyepiece. Astronomy and numismatics are time consuming hobbies  Below my homemade telescope, with commercial mirrors. 13" Dobson. I'm more a classical observer. @Sue... with your telescope you can try open cluster. Few of them are really nice with a wide field telescope. I don't know if you already use SkySafary application, but it's really usefull.  Edited by SP67
04/25/2021 07:09 am
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Valued Member
United Kingdom
126 Posts |
SP67 it's truly an antique 4.5 inch famously useless in its supplied 4mm 25mm and Barlow. It's a pure pain to operate. If I can make enough selling Dads coins am getting a decent Celestron Dobsonia with hi specs automation. Am used to the cold. But 4 nights Automated exposures are total nuts!
Sue x
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Pillar of the Community
United States
7276 Posts |
If you think 4 nights is tough, try 2 years although not all together :)  Edited by hfjacinto
04/25/2021 3:16 pm
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Valued Member
Canada
234 Posts |
@Sue.... I understand exactly what you mean. I have the big brother of your telescope. Tasco 4.25" f/8. This is the first one I got in 1982. The optics is not too bad, but the mount horrible.... And I never used the 4 mm eyepiece or barlow.... If you change your mount, the telescope itself is probably good. @hfjacinto How many shots did you co-add to get your planet pictures.  Edited by SP67
04/25/2021 6:03 pm
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Pillar of the Community
United States
7276 Posts |
@sp67, I believe her telescope is a Bird/Jones next which is probably one of the most comprised designs. Its limited by the fast optics and the corrector in the focuser. Its not worth spending money on a Bird/Jones newt. You're better off getting a 6" DOB as it will work better. For the planets, I used a monochrome video camera and filters. Took probably about 30 minutes and 1000's of images which I stacked. The planets are about many and fast the DSO stuff is fewer but many hours.  |
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Pillar of the Community
United States
7035 Posts |
I have no clue about what you all all talking about...But I love the photos hjf  |
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Valued Member
Canada
234 Posts |
@hfjacinto .... I don't know if it's a Bird Jones configuration. I was not thinking about an expensive tripod, but a basic small homemade Dobson instead. Her telescope is quite compact compared to mine. Much better for travel and summer holidays.
I know planets and DSO (Deep Space Object) are different beasts. I was just wondering if you were using video cam to grab your planets. With modern software, even a classical webcam can now do a really good job with planets.
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Pillar of the Community
United States
7276 Posts |
Quote:
@hfjacinto .... I don't know if it's a Bird Jones configuration. I was not thinking about an expensive tripod, but a basic small homemade Dobson instead. Her telescope is quite compact compared to mine. Much better for travel and summer holidays. I'm pretty certain its a Bird Jones, what that is, is a very fast (F4 or slower) with a corrector lens in the focuser. The fast mirror makes lots of coma, so you have basically a Barlow in the corrector which doubles the focal ratio. Fast reflectors have been around (you can get them down to F3), but they are very hard on eyepeices, so you need a PARACORR to correct the coma for them to be good. A bird/jones just uses a 2X barlow or something like that which really just magnifies a mushy image. Honestly for travel a nice pair of Binoculars are better than a scope unless you plan some long observing sessions. @Greasy, here are a few more pictures.  The below, the little black dot is mercury crossing in front of the sun.    |
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Pillar of the Community
United States
9792 Posts |
Checking in! Astrophotography nut here as well! A few of my telescopes...  My first serious set up - Yep all film 8" Meade SCT LX-200 F/6.3.  Observatory I built with my friend at his house near by. 6" APO Refractor.  My backyard in the summer with my portable rigs, 11" SCT reflector and a 4" APO refractor (sometimes I have a 3" refractor on instead).  The 16" astrograph (in storage now) when it was set up at iTelescope in Australia for remote imaging.  The newest scope a Planewave 20" undergoing testing before the new Planewave mount arrives. Observatory North of me at my friends farm about 30 miles away. Remotely run if needed.  Shot of the Southern sky from Sidings Springs in Australia, this is a Bernard 35 in Orion with the 16" It's almost straight up in the sky there.  The Pleadies (aka: Subaru, M45 or the 7 sisters)  Two of my favorite galaxies M81 and M82 (aka; Bodes galaxy and the Cigar). "Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013! ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector. See my want page: http://goccf.com/t/140440Edited by westcoin
04/26/2021 1:45 pm
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Replies: 21 / Views: 4,510 |
Posted 04/24/2021 07:44 am
