SolarChat!

pupak · Re: Sun April 14, 2024 Superb FD pictures. Petr

Superb FD pictures.
Petr

pupak

Superb FD, Arne.
Petr

pupak

Superb.
Petr

pupak

Superb FD and animation. Excelent work.
Petr

pupak

Superb animation.
Petr

pupak

Superb FD, Mark. CaK is my far future.
Petr

pupak

Superb set of FD photos, Arne.
Petr

pupak

Superb collection of solar photos, Pedro,
Petr

pupak · Re: Full Disk 13/4/24 and 3634/3633 Superb photos. Petr

Superb photos.
Petr

pupak

Lovely images, Petr. That scope amazes and terrifies me at the same time. ;) Stu. It's a monster, but it works well. Focusing by moving the mirrors has probably never been used on a refractor in front of me before, at least I have not come across a similar concept anywhere. The shortening is signif...

pupak · Re: Full Disc 12-04-2024 Superb FD photos. Petr

Superb FD photos.
Petr

pupak

Superb FD pictures, Arne.
Petr

pupak

This monster hadn't been out for a long time, so I took her out in the sun. There was no danger of getting burned because the sun was 90% of the time behind clouds and in a haze. It was a struggle to produce 4 photos with dual setup. On the one hand TV4x and on the other hand TZ4. The haze made the ...

pupak

It's a good idea to 3D print a bracket that slides onto the Quark and has a tight opening for the connector body. This prevents mechanical stress on the connector and eliminates problems.

pupak

If you do a simulation in Optgeo, it will become clear to you that it is unusable for solar purposes. A telecentric bundle emerges from the first element, not a convergent one as expected by the second element. In principle, it can no longer function properly. If the first element is Barlow, the out...

pupak

OlegLviv wrote: ↑Fri Apr 12, 2024 3:05 pm 150/F6 with? TZ4? TZ3? 429mm better why do you use 178????

TZ4 + 1.5x Barlow. I tested cameras for optimal using.

pupak

I know it's a hundred times different chicken, but today's milk broth brought a few photos that I'd like to share.

pupak

Superb session.
Petr

pupak

Superb FD photos, Arne.
Petr

pupak

Superb FD and details.
Petr

pupak · Re: Full Disc 11-04-2024 Very nice FD pictures. Petr

Very nice FD pictures.
Petr

pupak

Supebr FD.
Petr

pupak

KMH wrote: ↑Thu Apr 11, 2024 6:20 pm Amazing details!
Was there a benefit to adding the 1.5x barlow plus the 0.75x reducer, as opposed to just the 3x by itself?
Kevin

Definitely yes. The F27 has significantly less contrast and a 3D effect.
Petr

pupak

Thank you all for the positive feedback.
Just one technical note. If you put a divergent lens in front of the TZ3, you need to adjust the focal plane distance of the TZ3. It will no longer be 250mm, but will be shortened to approx. 200mm. It needs to be tested until the contrast is the best.

pupak

It cleared up at noon, so I tried another telecenter option. 1.25" Barlow 1.5x in combination with TZ3x. IMX429 camera with 0.75x reducer.
Seeing was lousy in the midday sun, but I expected that. The combination proved well usable on ISTAR.

pupak · Re: Full Disc 10-04-2024 Superb detailed FD. Petr

Superb detailed FD.
Petr

pupak

Cannot combine two telecentric elements.....Why? My methoud TV4x+TV2x works! Yes need less tilt but works! I have 8x on my TS 152/F6 and f48 like you but your TV4x+ES2 shorts and all! On site Televue write about Paracorr 2 and TV2x that methoud works because Paracorr 2 telecentric too. It kind of w...

pupak

Nice result I tested a few days ago TV4X+2X powermate, interesting results. Tell me about TZ3 and TZ4 you put right after TZ3 or TZ4 barlow 1.5x? You tested only f24 with TZ4x or Powermate 4x? All the difference on f48 is only in the contrast and that's it? Cannot combine two telecentric elements. ...

pupak

Superb result.
Petr

pupak

Superb.
Petr

pupak

Superb.
Petr

pupak · Re: Full Disc 09-04-2024 Superb FD pictures. Petr

Superb FD pictures.
Petr

pupak

zhouQin wrote: ↑Wed Apr 10, 2024 1:30 am May I ask what ERF you are using

Baader DEFR 160mm.

pupak

Hi I have a 2" 2x ES and 1.25" 2x ES, with two doublets in each. The fronts are black but have no lettering. The 2x and 3x black rings you show look like they come off a normal barlow. In any case you could not remove the front doublet from a telecentric barlow and just screw it on to a c...

pupak

The deflection is not great. I was just trying different variants with regard to combinations of Barlow and telecentric optics. Barlow has no negative impact on image quality with either the TV4x or the TZ3 or TZ4. This is a very positive finding when using telescopes with a shorter focal length.

pupak · Re: jet transit during eclipse 8/4/24 Superb. Petr

Superb.
Petr

pupak

The milky days continue, so I've been testing different combinations of telecentres and cameras. Before TZ3 and TZ4 I put 1.25" Barlow 1.5x and on TV4x 2" Barlow 2x. I got as far as F48. You could see it on the contrast, but the exposure time reached 20-25 ms. I reduced the smaller chips t...

pupak

OlegLviv wrote: ↑Tue Apr 09, 2024 10:45 am THank you for answer and me interesting about 2x40mm together stacking! You do it 2 RAF adapters and stack together and maybe you put ND or Polarizer filter between 2xLunt40 than prevent glare.Do you have photo?
ThaNK YOU!

No filters, just a 25mm aperture between etalonss.

pupak

Superb.
Petr

pupak

Superb results, Pedro.
Petr

pupak

When I used the LS40 as a front, uniformity was good with both. In DSII with Quark, the diameter is limited by BF to 20mm. Glare issues were minimal. It is important to blacken everything. I don't know the bandwidth. I guess 0.8-1A. In tandem, the bandwidth is about 0.5-0.6A, but with F48 and more. ...

pupak

Superb set.
Petr

pupak

Thanks, i will try and see how far i can push contrast of a single ls40 + reduction afterwards. Im still dreaming of a working 2x ls40 ds. 2 x LS40 only work for me on Lichtenknecker 150/F24 on F48 with double BF 20mm. Lots of light and enough contrast. It doesn't work for me with any other telesco...

pupak

Good images and interesting post Petr. So the lower part is a 2 lens element, basically like a barlow right? I wonder if one can combine a classic barlow element with a telecentric, is it the same as a "pure" 6x telecentric with same lower field angle on the etalon and all? Would be nice ...

pupak · Re: 08 April 2024 Superb details. Petr

Superb details.
Petr

pupak

Nice FD and details.
Petr

pupak

Superb pictures and animations , Warrene and good luck with the eclipse!
Petr

pupak · Re: Full Disc 07-04-2024 Very nice FD pictures. Petr

Very nice FD pictures.
Petr

pupak

Superb result, Mark.
Petr

pupak

Nice my telescope 152/f6 please tell me about your double stack! You have quark+lunt 40? And tell me about your 2x and 3x telecentric barlows! Thank you! Because I have only 4x Powermate and all and many people say than Powermate 4x not telecentric ! I've been using the same Quark combo and Lunt LS...

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