[zantaphia]

[PhilRich]

645Z with the FA 200mm.

[nEjmEd]

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/

[PhilRich]

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.

[formercanuck]

645Z with the FA 200mm.

Mt. St. Helen's ?

[PhilRich]

Mt Rainer - St Helens had its top blown of with an eruption in the 1980's

[BostonUKshooter]

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!

[bobbotron]

From my yashica

[Cuthbert]

Mamiya 645E, 80mm f2.8, Provia 400.

[whwang]

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.

[Cuthbert]

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?

[whwang]

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.

[PhilRich]

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!

[whwang]

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.

[Ed Hurst]

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]