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06-15-2016, 02:33 PM - 5 Likes   #9196
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06-15-2016, 07:39 PM - 2 Likes   #9197
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645Z with the FA 200mm.
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PENTAX 645Z  Photo 
06-16-2016, 02:15 AM - 14 Likes   #9198
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Pentax 67
S-M-C Takumar 6x7 105mm f2.4
with extension tube 2
on Fuji Neopan Acros 100 film
developed in Tetenal Ultrafin Liquid (1+20)
/3,5 min pre wash, dev. 9 min, 20°C/
06-16-2016, 09:27 PM   #9199
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Here's another 645Z with the FA 200mm and the 540II flash. I find for pictures like this the auto focus in invaluable. Distance was about 125 ft away for the shot.



06-17-2016, 04:39 PM   #9200
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QuoteOriginally posted by PhilRich Quote
645Z with the FA 200mm.
Mt. St. Helen's ?
06-17-2016, 08:15 PM   #9201
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Mt Rainer - St Helens had its top blown of with an eruption in the 1980's
06-18-2016, 12:31 AM   #9202
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QuoteOriginally posted by nEjmEd Quote


Pentax 67
S-M-C Takumar 6x7 105mm f2.4
with extension tube 2
on Fuji Neopan Acros 100 film
developed in Tetenal Ultrafin Liquid (1+20)
/3,5 min pre wash, dev. 9 min, 20°C/
Excellent work!
06-18-2016, 07:16 AM - 4 Likes   #9203
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From my yashica





06-18-2016, 03:54 PM - 1 Like   #9204
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Mamiya 645E, 80mm f2.8, Provia 400.
06-19-2016, 09:42 AM - 6 Likes   #9205
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Two-frame panorama made with FA35/3.5 @F5.6 and 645z. Total exposure is 4.35 hr.

The color aberration of this lens is very severe even at F5.6. This is not an ideal lens for astrophotography, and I doubt any of the current 645 lenses are.
06-19-2016, 01:53 PM   #9206
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QuoteOriginally posted by whwang Quote

Two-frame panorama made with FA35/3.5 @F5.6 and 645z. Total exposure is 4.35 hr.

The color aberration of this lens is very severe even at F5.6. This is not an ideal lens for astrophotography, and I doubt any of the current 645 lenses are.
Would it be better to use a telescope or a big reflex tele?
06-19-2016, 05:02 PM   #9207
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QuoteOriginally posted by Cuthbert Quote
Would it be better to use a telescope or a big reflex tele?
I think so. After spending several months trying various 645/67 lenses on 645z, I decide to almost use it on my telescope exclusively. I will leave wide-field work like this to my D800 and Sigma Art lenses. With similar total exposure time, I can reach much better quality with D800+35/1.4 than 645z+35/3.5.

Pentax, wake up! This is the best camera for astrophotography, but it doesn't have good lenses. You used to produce one of the best astrographs, you should know this.
06-19-2016, 05:18 PM   #9208
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QuoteOriginally posted by whwang Quote

Two-frame panorama made with FA35/3.5 @F5.6 and 645z. Total exposure is 4.35 hr.

The color aberration of this lens is very severe even at F5.6. This is not an ideal lens for astrophotography, and I doubt any of the current 645 lenses are.
How was this picture taken? I don't see any star trails.

You have an awesome set of night sky pictures on your site!
06-19-2016, 06:44 PM   #9209
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QuoteOriginally posted by PhilRich Quote
How was this picture taken? I don't see any star trails.

You have an awesome set of night sky pictures on your site!
Thank you. I used an equatorial mount to track the motion of stars, so there are no star trails. The nearly 4 hr of exposure is actually composed of more than 80 3-minute exposures at ISO 800. The short-exposure images are stacked in post processing to reach an equivalence of 2-hr long exposures. Then the two 2-hr panels are stitched in Photoshop to form the panorama.
06-19-2016, 07:24 PM - 3 Likes   #9210
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Taken during Sydney's annual Vivid Festival - 645Z plus 28-45 f4.5 DA lens @ 43mm and ISO 1600.

[IMG][/IMG]

---------- Post added 06-20-16 at 12:25 PM ----------

645Z plus 90mm f2.8 DFA.

Everyday Sydney scene with the lights of the annual Vivid Festival creating an iconic background that nobody seems to be noticing.

[IMG][/IMG]
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