using ND Filter


Jan 20, 2008
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#1
Hi,

In order to syn the flash and use a bigger aperture on bright backgnd,
is it a feasible idea to use ND filter ?

Tks
 

sabee

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Mar 12, 2009
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#2
Yes and its quite a common solution as well. Depending on whether you're using the flash as a fill flash for your subject, your background may be underexposed.

Your other option is high speed sync.
 

Jan 20, 2008
378
0
16
#4
Thanks Guys ...i suppose :bsmilie:

Btw,
For taking slow shots of waterfall etc on bright day,
is ND8 or ND400 is more suitable ?

I suppose ND8=3 stop and ND400=9 stop.
Pls correct me if wrong.

Thanks.
 

sabee

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Mar 12, 2009
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#5
Thanks Guys ...i suppose :bsmilie:

Btw,
For taking slow shots of waterfall etc on bright day,
is ND8 or ND400 is more suitable ?

I suppose ND8=3 stop and ND400=9 stop.
Pls correct me if wrong.

Thanks.
ND400 is actually around 8.6~8.7 stops, but 9 stop is close enough I suppose.

To get the approximate shutter time, just take X from NDX and multiply your shutter time. For example, a 1/200s shot will take 1/200 * 400 = 2s with a ND400 on. That sounds about right to smooth a waterfall. On the other hand, 1/200 * 8 is not quite enough :)
 

Jan 20, 2008
378
0
16
#6
ND400 is actually around 8.6~8.7 stops, but 9 stop is close enough I suppose.

To get the approximate shutter time, just take X from NDX and multiply your shutter time. For example, a 1/200s shot will take 1/200 * 400 = 2s with a ND400 on. That sounds about right to smooth a waterfall. On the other hand, 1/200 * 8 is not quite enough :)
Thanks Sabee, great tips. :thumbsup:
 

Jan 20, 2008
378
0
16
#7
Hi,

2 more questions,

how many stop is ND110 filter ?
Is it necessary to pre-focus before putting on the ND filter such as ND400 ?


Thanks
 

sabee

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Mar 12, 2009
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#8
Hi,

2 more questions,

how many stop is ND110 filter ?
Is it necessary to pre-focus before putting on the ND filter such as ND400 ?


Thanks
Yes, you should pre-focus before using high stop ND filters. Generally for landscape, using the hyperfocal length suffices: http://en.wikipedia.org/wiki/Hyperfocal_distance

The B+W 110 is not actually ND110, its more like ND1000 (10 stop). 110 is just some model number B+W uses.
 

Last edited:

Numnumball

Senior Member
Mar 6, 2009
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#9
Hi,

2 more questions,

how many stop is ND110 filter ?
Is it necessary to pre-focus before putting on the ND filter such as ND400 ?


Thanks
Yes, u have to..i barely see **** when i put on my ND400, much less to compose and prefocus.. :)
 

Jan 20, 2008
378
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16
#10
Thanks Sabee & Numnumball,

That's clear :thumbsup:
Guess i will need a ND8 & ND400.
 

night86mare

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Aug 25, 2006
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#11
Hi,

2 more questions,

how many stop is ND110 filter ?
Is it necessary to pre-focus before putting on the ND filter such as ND400 ?


Thanks
stated 10, but actually i think closer to 10.5-11.

anyways, yes, your camera cannot AF also. :bsmilie:
 

wildcat

Senior Member
Sep 8, 2004
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#12
Hi,

2 more questions,

how many stop is ND110 filter ?
Is it necessary to pre-focus before putting on the ND filter such as ND400 ?


Thanks
Supposed to be 10 stops. It doesn't use the standard naming convention naming but makes it easier to count the stops. Just subtract 100.

B+W's ND 103 is 3 stops, ND 104 is 4 stops, ND 110 is 10 stops.

I prefer the standard way, i.e. ND8 is 8 attenuation factor (3 stops). That way I can use time multiplier. If a normal photo without ND will take in 1sec, then with the ND8 it should be exposed for 8 secs (1x8secs). Thus for ND400, for what would be a 1sec shot, with the ND, it would be 1secx400 = 400sec = 6mins 40secs.
 

Jan 20, 2008
378
0
16
#13
Thanks for the info :bsmilie:

Btw,
Beside 77mm, is there any 82mm ND400 filters ?
I just want to buy the biggest and use step-up ring,
dont want to end up with multiple sizes.

Tks.
 

Jan 20, 2008
378
0
16
#16
8-16mm surely sounds very appetizing :bsmilie:


Not sure anyone done this,
If you have a 82mm and caught in a situation where you only have a 82-77 stepdown + filter,
how much would you lost when you crop off the vignette ?
Easily 20% i guess.
 

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