Hi The blocker front temperature is in the range 39-42C with the UV-IR filter and any red, Optolong 40nm, 35nm or Red CCD. The UV-IR shows 32.4C on its front surface. The Optolong looks like my Lunt ERF, Red glass IR block and maybe non-reflection back as well. It heats up to about 60C right after t...

Hi I was out having a play with ERF filters. Visually the long prom lower right showed more structure for me. But the streched image shows more than a brief look could. I am happy with proms from the Chromo. I need to look at getting more details out of the surface. Currently use a PL to dim the ima...

Very nice images.

The full disk reminds me of what I could see.

Cheers. Andrew.

Well done to capture the image.

Hi

Well done.

Thanks. Andrew.

Well done.

I was lucky to see it by chance visually.

Cheers. Andrew.

Hi I looked at the blocker temperature with no filters in front and the Combo Quark cold. It tops out at 35C. So nowhere near 70C max operating temp. Not seen over 39C with UV-IR and the Combo Quark heater on. The 4.2x with smaller blocker but not by the heated etalon may be different. Is the Blocke...

Hi

Yes a nice windy river of fire in that group today.

Cheers. Andrew.

Hi

Very nice. I had lovely views of the proms.

I cought the spike over the little active region after it had developed loops.

Cheers. Andrew.

Hi

Nice.

Luckily saw the loops whilst doing ERF testing on my Combo Quark.

Cheers. Andrew.

Hi Been having a play with the Quark Combo and 90mm. After another set of tests today using just UV-IR, Baader 35nm and the Blocker filter mostly measures in the 30s'C so I think the Quark heater has most influence on its temperature. If thats so its 7-17C higher than the default specified temperatu...

Hi I was lucky to catch the loops when doing some ERF testing.

Nice images.

Cheers. Andrew.

Hi

Very nice.

Out looking at ERFs and Blocker filter temperature.

Lots of nice details in the proms visually. I switched to my closed non-dominant eye for more details briefly.

Cheers. Andrew.

Hi

I was doing ERF and blocker temperatures on my Combo Quark today.

There were several nice proms to view.

And a few little flares in an area with spots as well by the longer prom.

Andrew

Hi Starting from a minimum of a UV-IR ERF filter I am looking at whats needed to hopefully on an average UK day get 23C at the blocking filter. I did start today but as it was mostly cloudy so lots of moisture in the air to absorb long IR I was getting variable results. Need a calm clear day. I star...

Hi

I am continuing ERF testing and effects on the blocking filter temperature on my ERF safety testing thread.

Cheers. Andrew.

Matt I used this stepdown adapter https://www.ebay.co.uk/itm/324302736572 to mount the filter to the front on my PST. It looks to be the perfect place for it because its diameter is very close to the light cone diameter at that point. I would be wary of visual use. I can tell from the camera exposu...

Hi In my ERF tests with a full 3 pack ERF and a 7nm on a 23C in the shade day the 12.5mm blocker front was 21C. Last summers shade was 14C hotter than that in the UK. Just 2C below standard blocking filter reference temperature of 23C. The Combo was warmer without a 7nm. It was a few degrees warmer ...

Hi

I had a similar visual view of the proms in between the clouds.

Cheers. Andrew.

Hi I shortened the ERF stack a bit to ensure light cone stays inside front filter edges. I seem to have a few variables: UV Red transmission, Blue and green suppression. Short IR Long IR Mark says the Quark will block this. Sunny afternoon but seeing over town poor. 1. Quark Prominence on 4.2x. As t...

Hi

What an active sun and great image of it.

Cheers. Andrew.

Hi 4.2X fronted Quark. The 12.5mm blocker on the front is seperated from the Quark body. So we need to control the temprature with pre-ERF. And in warmer climates would need active cooling to keep it down to 20C? Combo Quark. The 21mm blocker is mounted directly on the Quark front, so I assumed a 40...

Hi

That looks like a real mod. And you must be pleased with the results.

Cheers. Andrew.

Hi Mark, You say the Quark blocker goes to the far IR so does it mean that I do not need a KG3 in my internal ERF stack? I have asked about the filter several times on here but no one seems to know. And no full bandwidth chart I have seen. Thanks. Andrew. Hello Andrew, If you go to this page : http...

Hi " There is no ITF but a 12nm Astronomik filter in front of my BF30 .' Seems confusion about names for Etalon Comb trim / blocking filters possibly. Across different manufacturers. And this is about non-quark set up where he is using a Coronado BF30. And the 12nm as an ERF infront of the BF30...