Sunny! 90mm F6.7 new ERFs and DS PST

[AndiesHandyHandies]

Hi

I am now using 3 dielectric filters for an internal ERF setup.

Baader UV-IR stacked with RED CCD filter 100nm both on 2" extensions. Far enough up to keep suns image within the glass of the filter.
And a Baader 7nm, tilted, on the front of the diagonal.

Temperatures: Where I have BBE its the Black Body equivalent the IR thermometer will be calibrated for, used for checking meat is cooked. Variations due to image shift.

Reflected ERF light out of objective 110C.

Objective Glass 31.6C, or the tube internals behind it.

In front of 2" filters there is a machined off, silver front, 48mm to 28.5mm adapter. 44C taken out.

UV-IR 38.6C front taken out

Red CCD 100nm back 38.7C taken out

Looking up back of the T2 diagonal 319C BBE

Add a 1.25" Baader 7nm to front of diagonal body 137C BBE

Front of the 7nm 37C taken out.

Looking up back of 3x TE in diagonal 93C BBE, reduced intensity.

Front of the Quark blocker 41C taken out.

Looking up the back of the Quark 41C. 0.7A slice.

Front of the PST 41C taken out.

Looking up back of PST 39C BBE.

40mm Eyepiece

Looking up back to Sun 38C. I assume perfectly safe as body temperature.

Front element 39C taken out.


60mm F6.7 Triplet.

First tried with VK 3x TE for F20 full disk and DS with PST etalon.

Nice surface details and proms.

And then added ES 2x TE for F40.

Good views of surface. A reasonable view of the polar corona. Visually filaments on the darker limb seem harder to pick out.

The view looked to have a bit more contrast and squirly line details than Stuarts and Marks full disks taken on the day.

So well pleased with work on set up.


Today I had a go with the 80mm F15 doublet.

First at 2x with TZ2 for Baader official F30. Double stacked with PST. Adding a 2x TE was a bit much.

And then with VK 3x TE for F45 and a bigger image.

I found the polar corona was not as visible as in the 90mm.

On balance the 90mm just has the edge

Try out the RuMak 180 tomorrow. The Quark has always looked a bit soft on that. In PST Mod2 mode showed nice details in the sweet spot.
I do not know if the TE are optimised for refractors.

Cheers. Andrew.