66245 Heatsink mirror mount for 81045

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TheSkyBurner
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66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 6:44 am

As promised here is the mod instruction for the newport / oriel brand 66245 heatsinked mirror mount, which is specifically for housing the 81045 mirror.

While there is likely other parts you can use for this, what I used EXACTLY is linked below.


With these parts you can very easily upgrade the mirror mount to be compatible with 2" telescope standard parts!

First part you need, is this astro optics 2" short eyepiece holder. (this is the exact off the shelf part I used)
https://www.ebay.com/itm/Astro-Optics-S ... 1063854906

Second part you need is the nosepiece. (this part was cannibalized from a jason model 315 vintage telescope)
The dew-shield on this Jason 315 telescope is the exact 2" nosepiece that I used. It is also available on several other brand vintage scopes, as it seemed to be a very common telescope part of its time.

https://www.ebay.com/itm/jason-Model-31 ... 3121324621

You can also get this nose piece part from the sears model telescope below.
https://www.ebay.com/itm/VTG-SEARS-REFR ... 2940192149

https://www.ebay.com/itm/Vtg-Sears-Refr ... 3683161994

The nosepiece is also on this vintage tasco model.
https://www.ebay.com/itm/VINTAGE-TASCO- ... 3142396222
Last edited by TheSkyBurner on Fri Jun 15, 2018 8:24 am, edited 6 times in total.

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 6:58 am

The first thing you need to do is drill three holes into your eyepiece holder and the mirror mount. The best way to do this is to find the machined perimeter line alogn the bottom of the 2" adapter.

When you find the perimeter line, make a pilot hole in the 2" adapter first with a very tiny drill bit.

NExt place the adapter over the 66245 male port, and make the through hole into the mirror mount. Make sure both parts remain flush the entire time while doing this.

After the first hole is drilled, use an air blaster bulb to get rid of the metal fragments.

When the first hole is complete, thread in the first screw to force hole #1 into alignment..

Next drill two more pilot holes for the next two screws.


66245  hole A.jpg
66245 hole A.jpg (210.08 KiB) Viewed 622 times
66245  hole B.jpg
66245 hole B.jpg (198.03 KiB) Viewed 622 times
66245  hole C.jpg
66245 hole C.jpg (149.13 KiB) Viewed 622 times
66245  hole D.jpg
66245 hole D.jpg (205.67 KiB) Viewed 622 times
Last edited by TheSkyBurner on Fri Jun 15, 2018 7:25 am, edited 1 time in total.

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 7:01 am

Now unfortunately for this part I had to cannibalize a vintage jason 315 telescope. It only takes about 2 minutes. There may be another part out there online somewhere to replace this step, but this is exactly how I did this version and this part fits perfectly where it needs to be and serves its new purpose..

There are four retaining screws pre-installed in the 66245 mirror mount So all you have to do is tighten them with an allen key.
------------------------------------------------------------------------
Jason 315 ring A.jpg
Jason 315 ring A.jpg (124.86 KiB) Viewed 628 times
Jason 315 ring B.jpg
Jason 315 ring B.jpg (130.93 KiB) Viewed 628 times
Jason 315 ring C.jpg
Jason 315 ring C.jpg (138.61 KiB) Viewed 628 times
Jason 315 ring D.jpg
Jason 315 ring D.jpg (130.67 KiB) Viewed 628 times
Jason 315 ring E.jpg
Jason 315 ring E.jpg (185.54 KiB) Viewed 628 times






---------------------------------------------------------------------------------
As you can see it now perfectly fitted in the female port on the 66245. This part is threaded to support the dew shield. The 315 dew-shield happens to be a 2" nose piece. The female port on the 66245 is 49mm.
Jason 315 dew shield A.jpg
Jason 315 dew shield A.jpg (256.1 KiB) Viewed 628 times

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 7:15 am

So now that you have added both parts, your 315 dew shield is now a 2" nosepiece to the 66245 and the astro optics 2" eyepiece holder is now securely in place.


Your mod is complete! I hope you enjoyed this nice new variable in the solar imaging adventure.


66245  mod complete.jpg
66245 mod complete.jpg (198.34 KiB) Viewed 621 times
double 66245 mirror mount.jpg
double 66245 mirror mount.jpg (229.41 KiB) Viewed 621 times
double 66245 skybender A.jpg
double 66245 skybender A.jpg (170.14 KiB) Viewed 621 times
double 66245 skybender B.jpg
double 66245 skybender B.jpg (152.81 KiB) Viewed 621 times
double 66245 81045 UV only reflection.jpg
double 66245 81045 UV only reflection.jpg (170.71 KiB) Viewed 621 times
Last edited by TheSkyBurner on Fri Jun 15, 2018 7:26 am, edited 1 time in total.

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 7:22 am

Apollo!
Last edited by TheSkyBurner on Fri Jun 15, 2018 7:30 am, edited 1 time in total.

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 7:29 am

66245 heat sink mirror mount from newport optical
https://www.newport.com/p/66245

81045 UV reflective mirror from newport optical
https://www.newport.com/p/81045

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Re: 66245 Heatsink mirror mount for 81045

Post by MalVeauX » Fri Jun 15, 2018 1:59 pm

So basically this is a UV Wedge?

Yikes on those prices. ~$800 USD. Can get a Lunt module for this. I'm curious about a comparison to see if it's worth while (especially if it allows use of a large aperture instrument, over 4 inches).

Very best,

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Re: 66245 Heatsink mirror mount for 81045

Post by Valery » Fri Jun 15, 2018 3:31 pm

MalVeauX wrote:
Fri Jun 15, 2018 1:59 pm
So basically this is a UV Wedge?

Yikes on those prices. ~$800 USD. Can get a Lunt module for this. I'm curious about a comparison to see if it's worth while (especially if it allows use of a large aperture instrument, over 4 inches).

Very best,

For about the same money you can order a front mounted 145mm two bands (both Calzium K and H and H-a) DERF filter!


Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 4:16 pm

I buy them used for less than $200.00, it just takes patience.

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 4:20 pm

Here is one on ebay right now, not sure about what mirror is in this but if you really want one this is an unbeatable price. I just paid 175 last week

https://www.ebay.com/itm/NEWPORT-RIGHT- ... 0308346575

And remember the lunt system cannot be used on apertures greater than 100mm without a secondary erf like valery has suggested. Daystar says to use neutral density optics which lower brightness, The newport mirror will not reduce brightness.

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 4:26 pm

I talked to chroma technolgy, they say this beam splitter should perform equally to the newport mirror and the specs can be customizable. So the list of options exists somewhere out there. The ls152 cak module uses some kind of mirror rejector assembly. It just needs to be discovered off the shelf.

https://www.chroma.com/products/parts/t400lp

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 4:33 pm

The ls152 also uses a heatsink mirror assembly for cak imaging. So i am on the right path in finding what it truly is.

It may just be the pentaprism out of a pst. It maybe a beamsplitter. There are no puctures of it!
https://luntsolarsystems.com/product/ca ... -ls152tha/

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Fri Jun 15, 2018 4:51 pm

I just took a minute to email lunt and asked if it uses a prism or beamsplitter. Will have the answer hopefully by monday.

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Re: 66245 Heatsink mirror mount for 81045

Post by TheSkyBurner » Mon Jun 18, 2018 7:21 pm

I just got the reply back from lunt, Faye says the ls152 calcium unit incorporates a prism.

So there is that. I still have the two prisms from my CaK pst's if anybody wants them.

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