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ES finder too close to OTA or I have a huge head

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#26 csrlice12

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Posted 16 January 2013 - 01:43 PM

I swapped out the finderscope on my Omni102XLT with my Orion 9X50 RACI from my dob.....just ordered another 9X50 RACI. Anybody know where you can get the Celestron Omni Blue and White paint? I'd like to paint the new RACI Scope/holder with the Celestron colors (just nit pickey I guess).

#27 Bill Cowles

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Posted 16 January 2013 - 02:02 PM

Check the image with the bracket in my hand. The main part is a SV finder bracket and the lower part was just an aluminum wedge to fit the ES bracket slot, so maybe 4" or 5", just enough to keep my head off the OTA. Since then I'm ready to try the original SV finder, which is a RTA finder with reversed image and illuminated reticule. Because of Winter, probably won't be able to try for awhile.

This spring I hope to add a MoonLite focuser, which has 2 finder brackets, so might keep the ES finder on the ES mount and add a RTA to the MoonLite bracket. I can't use the SV bracket, not standard and would need for the modified ES bracket. Having 2 finders would also add more weight to the back. Having seen how nice it is to have brackets on either side of the OTA, it really makes it easier to use on an EQ mount. I never saw the advantage till I saw a MoonLite focuser with the 2 finder brackets.

Bill

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#28 Bill Cowles

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Posted 16 January 2013 - 02:04 PM

:waytogo:

Bill

#29 Bill Cowles

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Posted 16 January 2013 - 02:12 PM

The problem with the ES 127 is there is not a finder shoe, but a slot, so simply adding a finder is not an option and the reason I had to have a home made piece to fit the slot. It's hard to believe ES didn't see the problem, with their excellent finder, that is a straight through design. Our clubs ES152 does not use a straight through finder, so maybe they did see the problem and future ES127's will have a different finder. Some of the latest posts say the current ES127 doesn't even come with a finder, but don't know what kind of finder bracket shoe it might have.

Bill

#30 spongebob@55

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Posted 16 January 2013 - 03:07 PM

Right, I got that. But I'm going to use a peice of aluminum and add it to the post. I can add an inch or 3" or anywhere in between. So I was wondering how much height was added. The clamp, shoe, etc, is not a problem for me.
Thanks
bob

#31 Bill Cowles

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Posted 16 January 2013 - 03:32 PM

Does this help?

Bill

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#32 Bill Cowles

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Posted 16 January 2013 - 03:35 PM

Here is another shot of the new bracket with ES finder.

Bill

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#33 Arizona-Ken

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Posted 16 January 2013 - 09:45 PM

I found that an Orion 9X50 RA finder fits the rings perfectly on my ES127.

Arizona Ken

#34 Jon Isaacs

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Posted 17 January 2013 - 06:28 AM

I found that an Orion 9X50 RA finder fits the rings perfectly on my ES127.

Arizona Ken


:waytogo:

Straight through finders work well when the finder is at the sky end of the scope as is the case with most Newtonians but most refractors mount the finders close to focuser end which makes them awkward to sight through. I hope that Explore Scientific someday soon changes the standard straight-through finder for a RACI.

Jon

#35 spongebob@55

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Posted 17 January 2013 - 12:29 PM

[quote name="Bill Cowles"]Here is one more image showing how the finder bracket was attached to the SV finder bracket and the need for longer screws to tighten the finder. Hope this helps, because it really works.

Thanks, that gave me a good idea on how hight I should make it........

#36 spongebob@55

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Posted 17 January 2013 - 03:25 PM

I had a friend build a longer stalk for my ES 127ED as I had a very hard time using the finder it it's original location, next to the ota. :jump:

Bill


Hi Bill,
I've gotten an extra mount along with some rectangular aluminum, it order to do some 'surgical engineering' on my ES finder bracket/holder. My question to you is by how much was yours lengthened in order to make it more / comfortably usable?
Thanks
Bob


Here's my progress so far. Thanks for the pictures, guys!
Cut with a hack saw at the seam...

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#37 spongebob@55

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Posted 17 January 2013 - 03:29 PM

2- come up with a design, instead of a square block of 6061.

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#38 spongebob@55

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Posted 17 January 2013 - 03:29 PM

3- scribe and get out the hack saw.....

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#39 spongebob@55

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Posted 17 January 2013 - 03:30 PM

4- rough cut, then file, then 60grit sand, then hand block plane for edges and square. Whew. This material is hard.

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#40 Bill Cowles

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Posted 18 January 2013 - 11:31 AM

Looks good, but images are a little small , should make using the finder much easier. :waytogo:

Bill

#41 spongebob@55

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Posted 27 January 2013 - 08:40 PM

Well, here's my finished product. All crinckly painted and all.

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#42 spongebob@55

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Posted 27 January 2013 - 08:41 PM

#2

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#43 spongebob@55

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Posted 27 January 2013 - 08:42 PM

#3

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#44 CJK

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Posted 28 January 2013 - 07:11 AM

Nice workmanship! Looks great!

BTW, I think this thread has the best title ever. :lol:

-- Chris

#45 Scott Beith

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Posted 28 January 2013 - 07:18 AM

That is impressive!

#46 spongebob@55

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Posted 28 January 2013 - 10:44 AM

Thanks Guys. It took so much longer to cut the 6061 aluminum bar. I have no access to a machine shop, so had to cut it with a hack saw! If I had access, I probably would have made a more slim design, so it would be lighter. Never thought it would be so hard. But I think it came out OK. Now to wait for some clear refractor skies. I'll put the rest of the bar on the classified if anyone wants to do the same. Thanks for your pictures and input. I love CN.
Bob

#47 Bill Cowles

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Posted 28 January 2013 - 02:59 PM

I was told the same thing about new, longer stalks were coming, this was over a year ago.

Bill

#48 Bill Cowles

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Posted 28 January 2013 - 03:01 PM

Looks like an ES item, nice work. :waytogo:

Bill

#49 spongebob@55

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Posted 01 February 2013 - 10:39 PM

I was told the same thing about new, longer stalks were coming, this was over a year ago.

Bill


Just my luck. I do this, and I find that ES actually has them now. Dag!

#50 joelimite

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Posted 01 February 2013 - 11:08 PM

Nice work! I wouldn't worry about ES bringing one to market to compete with yours. They told me over two years ago that one was "in development."






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