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Pentax 6x7 1:4/600 for astro
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PostPosted: Mon Jul 17, 2017 5:51 pm    Post subject: Pentax 6x7 1:4/600 for astro Reply with quote

Hi,
next try to upload the picture
Sorry
Tom


#1


PostPosted: Mon Jul 17, 2017 9:25 pm    Post subject: Reply with quote

Like 1 which lens did you use (on a star tracker /guider I guess)?

Welcome here Tom!!


PostPosted: Mon Jul 17, 2017 10:42 pm    Post subject: Reply with quote

Hi Klaus,
The lense is the old Pentax 6x7 1:4/600 mounted on a Vixen GP.
one single exposure of 10min. Ha-Filter.
No real computing, just a little control of shadows and lights. No stackig!

cu Tom


PostPosted: Mon Jul 17, 2017 11:30 pm    Post subject: Reply with quote

Tom wrote:
Hi Klaus,
The lense is the old Pentax 6x7 1:4/600 mounted on a Vixen GP.
one single exposure of 10min. Ha-Filter.
No real computing, just a little control of shadows and lights. No stackig!

cu Tom


Looks pretty good to me Tom! Which camera/sensor did you use?

(I modified the subject to reflect the topic better...)


PostPosted: Tue Jul 18, 2017 9:27 am    Post subject: Reply with quote

Hi Klaus,

thanks for modoifying the subject.
Here is some data:

Lens: Pentax Super-Multi-Coated Takumar / 6x7 1:4 / 600
Camera: Canon EOS 5D II / ISO 800
Exp.: 10min Hα
Mount: Vixen GP
Guiding: PHD
Guidingcam: Fire-i (Webcam) + Zeiss Tele-Tessar 4/300

cu tom