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User currently offlineCYKA From , joined Dec 1969, posts, RR:
Posted (13 years 1 month 4 days 21 hours ago) and read 2572 times:

As most of you who regularly read this forum probably know, I recently bought an OM zuiko 75-150mm f4 zoom. Today i bought a roll of Reala and went down to the airport to test it out. After finishing my shoot, I had the roll developed at one hour photo. Here are the results I noticed:

1. All the photos were to some degree over-exposed. The light meter was showing a proper exposure yet they all came out too bright. Could this be caused by an old battery that needs to be replaced?

2.To achieve a "propper exposure" I had to set set the shutter to 1/125 and the lens to F5.6(next fstop from wide open) needless to say all but 2 of my landing/takeoff shots came out blurry. Is this due to a low shutter speed and incorrect panning.....is it notmal to get blurry shots shooting actiob at 1/125? I'm going to use 1/500 next time.

3. Ramp shots came out fairly sharp, though not tack-sharp at maximum zoom. Could this by caused by over-exposing the photos?

I appreciate any advice and/or comments.

6 replies: All unread, jump to last
 
User currently offlineRindt From Germany, joined May 2000, 930 posts, RR: 13
Reply 1, posted (13 years 1 month 4 days 20 hours ago) and read 2508 times:

Hmmm... something really sounds wrong... even when I had my 28-300 (which is F4-6.3) I could still use KR64 at 125th or even 1/250th at F8. So, if you're using a slightly "faster" lense, and using 100 speed film, you should be easily getting 1/250th at F8 or even 1/500th at F8... so, if you were shooting at F5.6 and 1/125th, you would have been overexposing each shot by 2 stops! Panning at 1/125th is not for the inexperienced... my worst experience was doing KM25 and 1/60th... that's tough, needless to say I had to throw away a bunch of those slides, but the few that turned out were simply stunning.

Your far-end "ramp" (which in itself is redundant, because "ramp" means 50mm...) shots could be possibly heat-blurred... something that's common in hot locations, and I'm sure Kamloops could very well be hitting the 30(!) mark.

Old batteries would not give you an under/over-exposed reading... the only thing it'll do is slow your camera's advance rate... (or "frames-per-second"). I did about 60 rolls to a set of batteries on my F90x, and on the last roll or so, my camera was just slow, but I was still getting normal readings... the last roll sounded a little funny as it went through the camera, but I got them back and they look perfect...

Put the camera into aperture priority mode, and set the F-stop to F8. If you're on a nice sunny day, it'll be easy to use this... provided you're using 100 speed film, 1/500th should not be out of the question. This is only what the "normal" is... but I can't tell you 100% what it should be, but if you think the light-meter is messed, you could always pick up a hand-held light meter, which will give you instant read-outs. But if the camera is continually giving you erroneous readings, I'd get the camera checked out...

Regards,
Rob




What other people think of you is none of your business!
User currently offlineCYKA From , joined Dec 1969, posts, RR:
Reply 2, posted (13 years 1 month 4 days 20 hours ago) and read 2499 times:

Thanks for the advice, but my camera is an old fully manual OM-1n. It only uses the battery for the meter. The battery thats in there came with the camera when I bought it 2 years ago, I think it needs changing. They guy at the camera store was talking about a power curve that the battery goes through that can affect the meter reading.

The lens has a constant f4 aperature throughout the zoom range, unlike your ex 4-6.3. When I get some more money I'll buy a new battery and some more film and shoot at 1/500 like I do with my 50mm, that should get rid of the motion blur.

Thanks for pointing out my error in regards to the "ramp shot". I didn't know what word to use to describe shooting parked aircraft.


User currently offlineRindt From Germany, joined May 2000, 930 posts, RR: 13
Reply 3, posted (13 years 1 month 4 days 17 hours ago) and read 2480 times:

The best batteries (lithium double-A) cost about $5 a battery. They last the longest (ie 60-70 rolls instead of 40-45), and for new cameras, they give that little extra "FPS" boost... but seeing as you're using an old manual camera, some normal double-A's would probably do the trick... how many rolls of film have you gone through on that old set of batteries? If you've done more than 30, get a new set... as you said, the batteries are 2 years old! All it takes it burning a few rolls in the winter time, and that drains the batteries in no time flat.

Regards,
Rob




What other people think of you is none of your business!
User currently offlineDa fwog From United Kingdom, joined Aug 1999, 867 posts, RR: 8
Reply 4, posted (13 years 1 month 4 days 12 hours ago) and read 2470 times:

CYKA:

Agree with your suspicion about the battery - this could well be what's causing the problem. Assuming it was a nice sunny day, your shutter speed/aperture combination is suggesting to me overexposure by 1-2 stops. Kinda tricky to judge exactly when you should replace the battery in these old cameras, where it only runs the meter (and in some cases the viewfinder display). What you probably need to do is suss out how many films you've used in the last 2 years, and use this as a benchmark for when you will *next* need to replace the battery.

As regards blur/camera shake, as a rule of thumb you want to be aiming for 1/focal length of lens you are using as a minimum shutter speed to keep things sharp. So for example, you can hand-hold a 50mm lens for a ramp shot at 1/60 sec, while if you're using a 200mm, you want to be looking at 1/200 - 1/250 sec as a minimum.

Panning using a slow shutter speed is a tricky technique, and extremely difficult at long focal lengths. Be prepared to burn a stack of film if this is what you want to do!


User currently offlineCYKA From , joined Dec 1969, posts, RR:
Reply 5, posted (13 years 1 month 4 days 1 hour ago) and read 2453 times:

Ok, I managed to get some more film and took some more shots. The weather is perfect and I shot with the sun behind me the whole time. This time I set the camera to 1/500 sec and f8 and 1/1000 at f5.6 for the takeoff shots (the film guide suggests 1/250 at f11 for these condtions).....does that sound about right to get the proper exposure in sunny weather? I dropped the roll off today for pick-up tommorow...ill report back with the results.

User currently offlineCYKA From , joined Dec 1969, posts, RR:
Reply 6, posted (13 years 1 month 3 days 1 hour ago) and read 2439 times:

OK, I got the photos back and everything seems to back to normal, photos exposed properly and were tack-sharp at 1/500 @ f8 like medioned above. My only disapoitment is with the fim, Fuji Superia 100 which appears to have terrible colour. Ohh well, back ro Reala next time.

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