manzoori
Posts: 1459
Joined: Sun Sep 22, 2002 7:08 am

Exposure Advice Please

Tue Oct 15, 2002 1:17 am

Folks,

I've just had two rolls of Kodak slide film developed by Kodak themselves. Of the 72 shots taken 18 have come back as 99.9% black slides with a small pinprick of light.

Careful examination of the slides reveals that these are indeed my shots of aircraft and the dots of light are the nose gear lights.

Being a relative newbie to 'Proper' photography I'm at a loss as to what might cause this. Confused I would hazard a guess and say that the images are horribly underexposed but quite why the camera elected to do that....? Confused

Thinking about it this is a pretty consistent trend on the camera (a Nikon F-401s)... almost every film returns one or two of these 'Black' frames.

Perhaps it's time to get it serviced!

Rez
Flightlineimages DOT Com Photographer & Web Editor. RR Turbines Specialist
 
PPGMD
Posts: 2398
Joined: Sun Sep 30, 2001 5:39 am

RE: Exposure Advice Please

Tue Oct 15, 2002 1:21 am

I think what happening is that the center meter on the camera adjusts the exposure for that light, well that light is probally alot brighter than the fusalage, and as such you get a really underexposed plane picture.
At worst, you screw up and die.
 
manzoori
Posts: 1459
Joined: Sun Sep 22, 2002 7:08 am

RE: Exposure Advice Please

Tue Oct 15, 2002 7:07 am

Thanks for the reply PPGMD.

Time to re-read the manual to find out how NOT to do that!

Cheers!

Rez
Flightlineimages DOT Com Photographer & Web Editor. RR Turbines Specialist
 
Craigy
Posts: 1076
Joined: Sun Jun 03, 2001 6:24 am

RE: Exposure Advice Please

Tue Oct 15, 2002 7:37 am

Soundes like the shutter sticking and not opening for long enough.
Does it do this with more than one lens?

Craig.
 
jasonm
Posts: 234
Joined: Tue May 02, 2000 3:46 pm

RE: Exposure Advice Please

Tue Oct 15, 2002 10:56 am

Hi Rez (love the pun),

Bascially,

As far as exposure is concerned with slides, you get back exactly what you took. Unlike negative film which has a wide tolerance for under exposure and over exposure, slide film has little margin for error and your exposure's must be spot on. Good Luck.

Regards,
Jason Milligan
Melbourne, Australia
 
photopilot
Posts: 3087
Joined: Mon Jul 15, 2002 11:16 am

RE: Exposure Advice Please

Tue Oct 15, 2002 12:30 pm

Try a roll where you meter off an 18% grey card, then set that exposure manually onto the camera. Or use an incident light meter. This will tell you if it is a metering, or a shutter problem.

Steve
 
Shawn Patrick
Posts: 2465
Joined: Tue Jan 11, 2000 7:30 am

RE: Exposure Advice Please

Tue Oct 15, 2002 1:18 pm

I'd advise taking a common sense exposure once in a while, just to make sure the equipment is working ok. Something like 1/500 at f/5.6 on a sunny day.

If this really is an exposure problem, then just check your exposure settings before you snap the picture. Obviously, 1/2000 at f/22 is going to produce a very dark image...

-Shawn
 
PPGMD
Posts: 2398
Joined: Sun Sep 30, 2001 5:39 am

RE: Exposure Advice Please

Tue Oct 15, 2002 1:23 pm

I agree with Photopilot, take a gray card outside on a sunny day, meter off of it, it should be either 1/250-1/100 at F16 (Provia likes 1/250 according to the data sheet).
At worst, you screw up and die.
 
Glenn
Posts: 1454
Joined: Fri Oct 07, 2005 8:33 pm

RE: Exposure Advice Please

Tue Oct 15, 2002 1:38 pm

You don't need to go to the expense of buying a 18% Grey card, the actual palm of the hand is also very close to the 18% grey mark. So if you meter off the palm of your hand you should be right, taking into consideration over or under exposing depending on light or dark objects.

Cheers
 
manzoori
Posts: 1459
Joined: Sun Sep 22, 2002 7:08 am

RE: Exposure Advice Please

Tue Oct 15, 2002 4:05 pm

Thanks very much folks for all your hints & tips.

Sadly my camera is pretty antiquated by today's standards... no little LCD displays telling me anything about the shutter speed or aperture chosen, I just get a couple of LEDs in the viewfinder! Yellow means its focused (it rarely is), a lightning symbol means it needs a flash fill in and a red circle means.... darn I forgot!  Wink/being sarcastic

Time to get a new camera... One that actually tells me stuff... My only problem is the wife already knows I've managed to get 27 shots accepted here so trying to sell the idea of a new SLR or dare I say it a DSLR might be an uphill struggle!

Wish me luck!

Cheers,

Rez
Flightlineimages DOT Com Photographer & Web Editor. RR Turbines Specialist

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