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Simeis 147 in Ha & HaRGB


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Very nice Kev, great to see what can be done with the Olympus Pen.

 

One question, your bright stars appear to be behaving themselves nicely with the Takumar. I have tried many different vintage lenses with astro and they range from downright awful on brighter stars to almost passable, have you had to do much processing with the Takumar? I ask because I am struggling with a Tair 3 f4 telephoto which is awful at F4 but imaging at f8 is defeating the object of telephoto shooting a little.

 

I have a few Pentax SMC lenses, (non Takumar) perhaps I should be trying those instead, hmmmm

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5 hours ago, philjay said:

Very nice Kev, great to see what can be done with the Olympus Pen.

 

One question, your bright stars appear to be behaving themselves nicely with the Takumar. I have tried many different vintage lenses with astro and they range from downright awful on brighter stars to almost passable, have you had to do much processing with the Takumar? I ask because I am struggling with a Tair 3 f4 telephoto which is awful at F4 but imaging at f8 is defeating the object of telephoto shooting a little.

 

I have a few Pentax SMC lenses, (non Takumar) perhaps I should be trying those instead, hmmmm

 

Thanks Phil,

 

Under normal circumstances, I find the best tradeoff (light gathering vs. star shapes) for this particular Tak of mine is actually around F/5.6. Sadly, that would have been way too slow to make any meaningful progress with this target - it's just way too dim. So, i chose to shoot wide open and deal with the consequenses in post. 

 

FWIW, the RGB was actually imaged at F/5.6, but that didn't require anywhere close to the amount of data as the Ha.

 

Shame about your Tair as I hear they made some cracking lenses.

 

Of my vintage lenses, the only one I can shoot astro at F/4 with good stars is my 55mm F/1.8 Super Takumar (yes, the radioactive one).

 

The good thing with shooting NB with these old lenses is that CA largely becomes a non-issue. There's just the corner star shapes to think about.

 

Cheers,

 

Kev

 

 

 

 

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Aha, of course, shooting narrow band is the way to counter ca of the lens, thanks Kev. Cos I,m osc all round here and rarely do nb I forget.

 

The Pen certainly accounts for itself well, I must try my Om d em1 on dso sometime.

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