B+W 110 ND Filter question

Y

yunus4u

Suspended / Banned
Messages
35
Name
Yunus
Edit My Images
No
Hi Guys if anyone can help me please iv'e received my B&W Filter and needed some help, Iv'e heard that by using this filter is there any possibility by removing people from pictures when taking pictures of architectural buildings or landscapes and scenery's. Also been reading that if i take long exposures in daylight anything more than 30 secs I should be using bulb mode with filter on lens. And for night long exposures without the filter would I still need to set in bulb mode and more than 30 secs. Thank You I'm new to this long exposure and also I've download a ND Filter exposure chart which I don't understand so if anyone can explain to me please.
 
if you have a long exposure, then anything not fixed will come out less well..... so if you had say a 30 second exposure, it would take 30 seconds to properly expose the subject but the people would probably have walked entirely past making them barely visible/invisible....

with daylight you are somewhat restricted by shutter length, as in lowest iso settings and highest f no for your lens/equipment etc as to not over expose etc, so nd filters and the like are essential really- just remember a solid sturdy tripod and preferable use a remote/timed shutter release etc..
 
light is measured in stops.... so in simple terms to keep the exposure level the same you can add/remove a stop of either iso, time, aperture and do the opposite with a different one.. e.g add 1 stop of iso and raise f no 1 stop.... (just be careful as most cameras go up in 3rd o stop increments, and/or half stop increments.... adding nd filters (say a 3 stop filter) would allow you 3 longer stops of time etc.... it all depends on the photo you want to get etc...
 
tezmed said:
light is measured in stops.... so in simple terms to keep the exposure level the same you can add/remove a stop of either iso, time, aperture and do the opposite with a different one.. e.g add 1 stop of iso and raise f no 1 stop.... (just be careful as most cameras go up in 3rd o stop increments, and/or half stop increments.... adding nd filters (say a 3 stop filter) would allow you 3 longer stops of time etc.... it all depends on the photo you want to get etc...
Click to expand...
what he said. and I'll add:

Brighten by 1 stop means letting twice more light in. So 30s becomes 60s.
Darken by 1 stop means letting half amount of light in. So 30s becomes 15s.

To calculate exposure, it is simple. For example normal day time camera auto setting says f8 1/125s ISO100.
With 10 stop filter, you'll need to double the shutter speed of 1/250s by 10 times:
1/125 -> 1/60 -> 1/30 -> 1/15 -> 1/8 -> 1/4 -> 1/2 -> 1s -> 2s -> 4s -> 8s

If 4s isn't your desired time, you can tweak other parameters, such as closing down aperture to get more motion blur.
f8 -> f11 -> f16 -> f22
8s -> 15s -> 30s -> 60s



To get best understanding of all this, you need to be very comfortable with the 3 variables that produces a well exposed photo: Aperture, Shutter speed and ISO. Make sure you are comfortable with shooting in Manual mode, get out of the Auto little green box.

See this very useful tutorial on theories behind the 3 variables http://www.talkphotography.co.uk/forums/showthread.php?p=5461784
 
Last edited:
wuyanxu said:
With 10 stop filter, you'll need to double the shutter speed of 1/250s by 10 times:
Click to expand...

Or, a possibly easier method is to mutiply the shutter time by 1000. So 1/250s becomes 1000/250s = 4s which gives the same result as the doubling 10 times (wuyanxu's example is actually doubled 11 times - just to show how prone to error it is).
 
I will be using my b&w 110 filter which is 10 stop for my 10-24mm nikon lens on my d5000 body. Would anyone advise to get a lesser ND filter by b&w such as a 4- 8 stop filter for long exposures during bright sunny days overseas such places like dubai or Oman where it is very bright during the day, or would I be fine with the filter I have got which is the 10 stop. Thanks
 
hollis_f said:
Or, a possibly easier method is to mutiply the shutter time by 1000. So 1/250s becomes 1000/250s = 4s which gives the same result as the doubling 10 times (wuyanxu's example is actually doubled 11 times - just to show how prone to error it is).
Click to expand...
ah, okay. many thanks for that. Your method is indeed a lot easier.

During bright daylight, a 10 stop is perfectly fine. At night, you may want a 3 stop instead.
 
You must log in or register to reply here.
Back
Top