Re: [APML] IC1396 with Pentax 67 300mm EDIF F/4.0

["Richard Crisp" <rdcrisp@earthlink.net>]

I think I had problems with both the stability of the mounting mechanism for 
the piggyback and probably also had the polar alignment off a bit and was 
getting rotation.

I had a very shaky attachment mechanism. If I do it again rest assured it 
will be solid as a rock using my home-built frame with guider:

http://www.narrowbandimaging.com/mounting_system_cla_page.htm

Although designed for ccd use with camera lenses, there's no reason it 
cannot be used with a film camera too.

That's the only film shot I have taken thus far. It was a kick getting such 
a wide FOV.

thanks for the comment on the ccd shot. That's what I do best. Film is a 
whole new game as I found out last year.

The wide fields are really nice for finding things to examine more closely 
with ccd later. It seems like a useful tool to me.




----- Original Message ----- 
From: "Ray Butler" <ray.butler@nuigalway.ie>
To: "Richard Crisp" <rdcrisp@earthlink.net>; "Discussion of Film 
Astrophotography" <astro-photo@seds.org>
Sent: Friday, August 26, 2005 5:52 AM
Subject: Re: [APML] IC1396 with Pentax 67 300mm EDIF F/4.0


>
> Hi Richard,
>
> That's field rotation in the film shot, right? The stars are elongated off 
> axis but not in the normal way you'd expect for lens aberrations.
>
> The CCD shot is legendary!
>
> Ray
>
>
>
> Richard Crisp wrote:
>
>> that's cool Wade
>>
>> I took a single film shot during the summer of 2004 using a Pentax 6x7 
>> piggybacked on my scope with a 150mm Takkumar f/2.8 lens
>>
>> I exposed for 40 minutes using Fuji HG120 ISO 400
>>
>> http://www.narrowbandimaging.com/ic1396_film_page.htm
>>
>> it was eight year old film that had been freezer stored.
>>
>> There's a ton of nebulosity in that area and I want to shoot more of it 
>> with CCD this year.
>>
>> here's a tricolor narrowband of IC1396 shot with CCD
>>
>> http://www.narrowbandimaging.com/ic1396_fsq6303_s2hao3_page.htm
>>
>>
>> ----- Original Message ----- From: "Thomas W. Earle" <twade@bmi.net>
>> To: <astro-photo@seds.org>
>> Sent: Thursday, August 25, 2005 11:13 PM
>> Subject: [APML] IC1396 with Pentax 67 300mm EDIF F/4.0
>>
>>
>>> To all,
>>>
>>> Here's my first attempt at capturing this faint nebula.  I'm quite
>>> surprised to see so much nebulosity in this region.  It's a close
>>> second to Gamma-Cygnus region.  The exposure was 75 minutes long at
>>> F/4.0.  The lab forgot to push the film 1-stop so the negative was a
>>> little dark.  Fortunately, Tony Hallas is just amazing when it comes
>>> to squeezing out every last detail in a slide, even if it's a little
>>> challenging.  I quickly flat-fielded the image using DBE in
>>> PixInsight LE so there may be some mistakes.  Let me know what you
>>> think.
>>>
>>> http://tinyurl.com/e24g6
>>>
>>> Wade
>>>
>>>
>>> _______________________________________________
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>>
>>
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>
>
>
> -- 
> Dr. Ray Butler
> Lecturer, Physics Department & Computational Astrophysics Laboratory,
> National University of Ireland - Galway, University Road, Galway, Ireland. 
> Web: www.nuigalway.ie/physics/ Email: ray.butler-AT-nuigalway.ie Tel: 
> +353-91-493788 FAX: +353-91-494584
> 

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