Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-15-2011, 01:14 PM   #1231
Veteran Member
lbenac's Avatar

Join Date: Jan 2008
Location: Burnaby, Canada
Photos: Gallery
Posts: 1,313
QuoteOriginally posted by Nesster Quote
I still need to do some internal lens cleaning & trace down that light leak, but I'm liking the results
I think that it is worth doing the cleaning. The classic look works.

Cheers,

Luc

02-15-2011, 01:15 PM   #1232
Veteran Member
lbenac's Avatar

Join Date: Jan 2008
Location: Burnaby, Canada
Photos: Gallery
Posts: 1,313
QuoteOriginally posted by Makten Quote
A few more with the 75/4.5 on P67II, Tri-X @ ISO 800...
No1 works for me

cheers,

Luc
02-15-2011, 02:14 PM   #1233
Pentaxian




Join Date: Jul 2009
Location: Seattle
Posts: 7,017
QuoteOriginally posted by nightfly Quote
In November I spent an evening at Schoodic Point, Acadia NP under the Full Moon. I had been wanting to expose some Acros on the ledges at the shoreline. I am glad I did. I am very impressed on how this film works in low light. Accutance is very high and it has superb reciprocity.

This is an image taken with the P67 45mm @ f/8 Hyperfocal 15 minutes exposure. Acros in Xtol.
.
That is really sweet! Love it.

So does your time add 1/2 stop for reciprocity? Trying to lean moon shooting, this is what I've worked out. The Looney 16 rule I'm aware of says add 18 to 18.5 stops from the Sunny 16 rule. So Sunny 16 would be (clear sky?) f8 @1/500 = f8 @ 8 min (Looney 16). Adding 1/2 stop for reciprocity = f8 @ 12min (18 stops) or 16 min (18.5 stops). Is that about right?

Last edited by tuco; 02-15-2011 at 02:30 PM.
02-15-2011, 02:49 PM   #1234
Senior Member




Join Date: Nov 2008
Photos: Gallery
Posts: 241
QuoteOriginally posted by tuco Quote
That is really sweet! Love it.

So does your time add 1/2 stop for reciprocity? Trying to lean moon shooting, this is what I've working out. The Looney 16 rule I'm aware of says add 18 to 18.5 stops from the Sunny 16 rule. So Sunny 16 would be (clear sky?) f8 @1/500 = f8 @ 8 min (Looney 16). Adding 1/2 stop for reciprocity = f8 @ 12min (18 stops) or 16 min (18.5 stops). Is that about right?
That is about right. With a Moon a day within full, 8 minutes at f/8 is standard. Due to the reciprocity curve for Acros you want to add a half-stop for a 12 minute exposure. I had filtered Moonlight with clouds and I exposed just a little longer. I go by feel as the moonlight brightens and fades. Fortunately Acros is forgiving here. 10 to 15 minutes is the range you want to be in. Seconds don't count on exposures this long. If you get within a minute or two your fine. Experience as well as trial and error helps. I tend to expose on the side of the longer times. Better to overexpose slightly than underexpose IMO.

02-15-2011, 03:29 PM   #1235
Pentaxian




Join Date: Jul 2009
Location: Seattle
Posts: 7,017
QuoteOriginally posted by nightfly Quote
That is about right. With a Moon a day within full, 8 minutes at f/8 is standard. Due to the reciprocity curve for Acros you want to add a half-stop for a 12 minute exposure. I had filtered Moonlight with clouds and I exposed just a little longer. I go by feel as the moonlight brightens and fades. Fortunately Acros is forgiving here. 10 to 15 minutes is the range you want to be in. Seconds don't count on exposures this long. If you get within a minute or two your fine. Experience as well as trial and error helps. I tend to expose on the side of the longer times. Better to overexpose slightly than underexpose IMO.

Thanks. I'd say 1/2 stop doesn't matter much with the latitude of negative film and scanning which means a few minutes don't matter too much for times that long. Yeah, I figured I use the 18.5 stops always for a full moon to error on the side of caution when the sky is clear.

Last edited by tuco; 02-15-2011 at 03:34 PM.
02-15-2011, 03:33 PM   #1236
Senior Member




Join Date: Nov 2008
Photos: Gallery
Posts: 241
QuoteOriginally posted by tuco Quote
Thanks. I'd say 1/2 stop doesn't matter much with the latitude of negative film and scanning which means minutes don't matter too much for times that long. Yeah, I figured I use the 18.5 stops always for a full moon to error on the side of caution when the sky is clear.
I'll be looking forward to your results!
02-15-2011, 03:40 PM   #1237
Pentaxian




Join Date: Jul 2009
Location: Seattle
Posts: 7,017
QuoteOriginally posted by nightfly Quote
I'll be looking forward to your results!
Looks like a no-go this full moon here. Rain or snow is now in the forecast for the 18th. How many stops you think should be added for heavy cloud cover? Three maybe? The clouds can be so thick here that there might as well be no full moon at all.
02-15-2011, 05:12 PM   #1238
Senior Member




Join Date: Nov 2008
Photos: Gallery
Posts: 241
QuoteOriginally posted by tuco Quote
Looks like a no-go this full moon here. Rain or snow is now in the forecast for the 18th. How many stops you think should be added for heavy cloud cover? Three maybe? The clouds can be so thick here that there might as well be no full moon at all.
You can always shoot many days before and after the full Moon. You can record more star trails in these times when the Moon is less bright. You will need to expose longer of course. Reciprocity failure will be progressive in longer exposures.

I prefer f/8 for the Pentax 67 wide angle lenses (45,55, and 75) as they are very sharp at that aperture and do not vignette, yet offer bright enough images for reasonable exposures. Depth of field is good as well. I sometimes will stop down to F/9.5 or f/11 and recalculate my exposure if I need more depth of field.

At ISO 100 @ F/8

Days before
or after Full ------------------- ISO 100 Film (Acros, Provia, E100)

Full --------------------------- 10-20 Min

1 ------------------------------ 15-30 Min

2 ------------------------------ 20-40 Min

3-4 --------------------------- 25-60 Min

7 * --------------------------- 120 Min +

* First or Last Quarter Moon


Last edited by nightfly; 02-15-2011 at 05:17 PM. Reason: Add more information
02-15-2011, 05:30 PM   #1239
Junior Member
Isis's Avatar

Join Date: Sep 2010
Location: Melbourne
Posts: 32
Great page of images from Makten and Nightfly
02-15-2011, 05:33 PM   #1240
Senior Member




Join Date: Nov 2008
Photos: Gallery
Posts: 241
An additional image taken the same full Moon night last November. The texture of the granite in moonlight is very seductive to me. This huge piece of granite is set up against the cliff leaving an opening to shoot through. The cliffs continue above and can be seen through the opening. One can also see star trails through the opening and the shadow gives away the Moon's position in the sky. That is an element I like to include in these images.

It is a very difficult area to set up a tripod and I have dinged my 67 body a few times just to get this shot. Shooting in the dark they say.

P67 45mm @ f/9.5 20 minutes exposure Acros 100 in Xtol.



Last edited by nightfly; 02-15-2011 at 05:39 PM. Reason: Reduced image size
02-15-2011, 08:53 PM   #1241
Senior Member
C-Factor's Avatar

Join Date: Feb 2011
Location: Albuquerque, New Mexico
Posts: 113
QuoteOriginally posted by GeneV Quote
Nice glamor, Latex. Looks like the new camera will be a keeper.

Pardon my cutesy farm shots of my wife and friends, but these show what I love about medium format. The first is barely cropped, the second more, and the last one is little more than 35mm. The 645 holds its own. The film, however, is soon to be discontinued Fuji 160s 220.




Wow the 645 is really impressive and talk about shallow DOF! That looks like Los Poblanos and some of your other photos are obviously taken on the Los Ranchos de Albuquerque. Thanks for sharing them.
02-15-2011, 10:45 PM   #1242
Veteran Member
lbenac's Avatar

Join Date: Jan 2008
Location: Burnaby, Canada
Photos: Gallery
Posts: 1,313
All the technical aspect of moonlight shooting is going way above my head but I certainly like the results

Some more from my first try with slow film and the Fuji evil twins

GSW690 Efke 25 (Tripod)

Small Talk


Loading up



GW690 Efke 25 (hand held)

Ruby on Deck



The GSW690 feels like a machine to make pano in one neg.

BTW if anybody has any idea how to have a couple of L-bracket with 1/4 holes machined at a reasonable cost let me know.

Cheers,

Luc

Last edited by lbenac; 02-15-2011 at 11:50 PM.
02-15-2011, 11:35 PM   #1243
Inactive Account




Join Date: Dec 2010
Location: Milano, ITALY
Photos: Albums
Posts: 37
QuoteOriginally posted by Makten Quote
A few more with the 75/4.5 on P67II, Tri-X @ ISO 800...
.
Very impressive shots (above all n.3)!

Also moonlight images are perfect and "seductive" (Nightfly)!
02-16-2011, 12:47 AM   #1244
New Member




Join Date: Nov 2010
Photos: Gallery
Posts: 14
fantastic
02-16-2011, 06:41 AM   #1245
New Member




Join Date: Nov 2010
Posts: 19
I'd love to post some of my pictures from my Pentax 67. I love this camera!

I don't remember what a lot of these were but if you want to know I'll try.
Attached Images
         
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
645d, 645z, camera, cameras, cheapo, drive, efex, film, flickr, format, frame, fujifilm, holes, lens, lomo, medium, medium format, p67ii, pentax 67, portra, post, road, roll, scanner, shot, shots, silver, software, strait, takumar 90mm
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
First Medium Format straightshooter Pentax Medium Format 3 08-24-2010 07:10 AM
Medium format... D4rknezz Troubleshooting and Beginner Help 9 04-06-2010 03:59 PM
Medium Format Soon? k100d Pentax News and Rumors 0 03-04-2009 12:09 PM
Medium Format Buffy Pentax Medium Format 5 03-19-2008 12:04 AM



All times are GMT -7. The time now is 03:37 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top