6 replies to this topic

[Uwe Pilz]

Dear observers,

 

when I looked at my star map yesterday, I saw NGC 1491 printed in red. I had no idea what to expect, but gave my 4-inch / Hα a try in my suburban site. Magnification was 6.6x. I saw the brightest parts of the nebula without much effort. The sky is full of Hα targets which I never tried to observe without that help.

[C.Hay]

Dear Uwe,

 

under my similarly suburban sky, and using a Gen2+ tube like yours, the Fossil Footprint also pops out at 5.6x with my front-mounted handheld f/2 setup. What fascinates me beside the entirely unknown objects that emerge with H-alpha is the ease with which old friends who I have visited with classic glass and OIII/H-beta filters for years now step out from their dim abodes, beaming and gleaming, and how large they become as not just their brightest parts are visible but their full extent.

 

CS, Christopher

[bobthruspace]

Hi Uwe, I have the ATN  PVS-7 2+ and I just received the Svbony 7nm Ha filter. I tried it out last night in pretty clear skies in Central Florida and couldn't see a darned thing, just alot of scintillation. Am I using the right brand filter? When I hold it up to a light all I see is deep dark red. It doesn't seem to draw enough light into the device. I'll take any advice from you and fellow CNer's. Regards, BTS

[Chen Sir]

It seems that the brightest portion of NGC 1491 is relatively easy to be seen, even though without NVD.

I have viewed it using my 152/F5 ED binoscopes with OIII filter and ES20mm 100°, magnification 37.5.

[a__l]

Hi Uwe, I have the ATN  PVS-7 2+ and I just received the Svbony 7nm Ha filter. I tried it out last night in pretty clear skies in Central Florida and couldn't see a darned thing, just alot of scintillation. Am I using the right brand filter? When I hold it up to a light all I see is deep dark red. It doesn't seem to draw enough light into the device. I'll take any advice from you and fellow CNer's. Regards, BTS

bobthruspace, I have read on other forums about using this filter with NV. People are happy. I don't have it.

Do you see Horse Head with him?

 

As an option, the PVS-7 does not have a gain knob and gain cannot be set correctly (for the object you are observing).

Edited by a__l, 18 March 2023 - 07:16 PM.

[a__l]

https://www.youtube....h?v=YEl5wcXfGUg

http://www.loptics.c...ra/spectra.html

It may very well be that this is the same with Optolong H-Alpha, 7nm 

But I can't say for sure.

This is very common in China. The store can put its own label on any product.

 

The figure does not show any band leakage. But this is make on a cheap device.

Attached Thumbnails

• 

Edited by a__l, 18 March 2023 - 09:01 PM.

[Dale Eason]

Hi Uwe, I have the ATN  PVS-7 2+ and I just received the Svbony 7nm Ha filter. I tried it out last night in pretty clear skies in Central Florida and couldn't see a darned thing, just alot of scintillation. Am I using the right brand filter? When I hold it up to a light all I see is deep dark red. It doesn't seem to draw enough light into the device. I'll take any advice from you and fellow CNer's. Regards, BTS

Well firsts you need to be looking at the part of the sky that might have Ha objects.  So tell us where you looked.  If you looked at or around Orion you should see something. There is plenty of Ha in that area.