NGC6188 in Ha widefield

[gregbradley]

I have narrowband data for this one as well.

A widefield look at a common object.

http://www.pbase.com/gregbradley/image/167800780/large

Greg.

[strongmanmike]

Nice, that the 300mm F4 lens again..?

I know I have said it before but I do need to get one of these lenses, great stuff... they should be ok for a 16803 chip too huh?

Mike

[gregbradley]

Yes same lens the 645 size. Not 100% sure if OK with the Proline. My Proline needs a service. I did put it on the Proline but bad vignetting and also bad tilt. Put it on the Microline and viola it was fine as is. It might be fine with some careful mounting so no tilt (I added some support to under the end of the lens or perhaps a mounting ring). What is cool about the lens is its double ED like an FSQ but not the correction of the FSQ nor the supreme lens accuracy. But its a good setup.

The 6x7 version would be the one for the Proline its just that bit wider. I have the 55, 75, 165 and 300mm 6 x 7. There is an ED version for the 300 and 400mm versions. The 300mm 6 x 7 is the one Marco Lorenzi used on his Proline. The non ED version is cheap and would be fine for narrowband but chromatic aberration for colour imaging. Again tilt is the issue as its long and heavy.

The 6 x 7 version is quite expensive still and not that common. But I suppose as its meant to be used with medium format 60 x 70mm its corrected circle must be at least 70mm.

Greg.

[Placidus]

That's a pleasingly different view. Far enough out to see overall structure. :thumbsup::thumbsup::thumbsup:

[gregbradley]

Thanks Mike. Widefield brings another perspective to these objects.

Greg.

[Slawomir]

Another very nice wide field from you Greg. Please keep them coming.

[Paul Haese]

Huge field of view Greg. I look forward to the colour version.

[gregbradley]

Thanks Suavi. I started imaging M17 last night in narrowband to see how it would compare with your wonderful M17 (love the latest version). Very cold last night and some dewing of the secondary may have been an issue (unusual for the CDK to dew up).



Thanks Paul. I have plenty of data. I may reshoot the RGB though and stop the lens down a tad.

Greg.

[atalas]

Great looking wide shot Greg :thumbsup:

[gregbradley]

Thanks Louie. Its a different look isn't it?

Greg.

[multiweb]

Very cool. Perfect framing for it. :thumbsup:

[gregbradley]

Cheers Marc.

Greg.

[Atmos]

Very nice Greg, super wide, deep and with lots of contrast :thumbsup:

[gregbradley]

Thanks Colin. I am preparing a narrowband version. I have most of the data.

Greg.

[topheart]

Awesome field of view there Greg!!
Cheers,
Tim

[gregbradley]

Thanks Tim. I spent some time tonight fine tuning the setup and am very pleased with how its performing.

Greg.

[Retrograde]

Really nice widefield view of this object Greg. Something you don't normally see.

[gregbradley]

Thanks Pete. I got more data for it and its waiting to be processed. Full narrowband and LRGB. Its good to image from a different perspective.

Greg.

[RickS]

That's a great FOV, Greg. Look forward to a colourful result!

[gregbradley]

I have collected a lot of data on this and other objects as we had a good run of clear nights with no moon.

It also looks like we are about to get another run of clear nights once the moon starts rising later in the evening.

Greg.