long exposure time - DPChallenge Forums

Pentax DA 18-55mm f/3.5-5.6 AF

12/04/2005 09:19:58 PM · #1

Hi to you all,

That is probably a rookie question, but need an answer.
What is the trick to avoid overexposition when taking a picture with a long exposure time? (Let's say more than 30s with f/16 and B mode).

I wonder how people are able to shoot pictures more than one minute without having any overexposition?

Thanks

Max

jab119

12/04/2005 09:24:06 PM · #2

it depends on your subject and your ISO

I shoot over a minute pretty often for astrophotography, and have gone a few minutes @ f20 to get a lightning shot over downtown houston.

the longest exposure I have ever done is 15 minutes.

James

DjFenzl

12/04/2005 09:27:47 PM · #3

well unless you just want to trial and error it for a while my best recommendation would be to get an external light meter.

Message edited by author 2005-12-04 21:28:04.

faidoi

Pentax K10D

12/04/2005 09:29:37 PM · #4

Neutral Density (ND) filter, Graduated ND filter, circular polarizer filer for waterfalls and landscapes. What are you shooting?

12/04/2005 09:54:38 PM · #5

Oops, I pushed the wrong button (report a post), my mistake.

Ok, I am more interested in shooting light in motion in the dark. What kind of filters work best? What is the advantage of having an external light meter?

jab119

12/04/2005 10:19:50 PM · #6

what type of light source will you be shooting. there are tons of examples here. jut may take a while to find them

James

Tamron 70-180mm F/2.8 Di III VXD

12/04/2005 10:22:32 PM · #7

let's say head and tail lights.

jab119

12/04/2005 10:30:16 PM · #8

something like this

freeway

lights

freeway2

James

MadMan2k

Sony Alpha a6400

12/05/2005 02:36:59 AM · #9

You should probably keep it around a few seconds for shooting moving cars - I have the best luck with using 1 second exposures or so. That way the stream of light doesn't fill the frame, and you have less chance of some odd looking streams because other things moved also.

This photo was taken using a 1 second exposure, with average city lighting at dusk.

caba

Nikon D800

Nikon AF-S Zoom-Nikkor 28-70mm f/2.8D IF-ED

12/05/2005 03:32:19 AM · #10

Here's a 32 second F/22 shot that came out nice.

ralph

Nikon Z9

12/05/2005 08:26:37 AM · #11

15 sec f22

15sec f32

Message edited by author 2005-12-05 08:31:44.