using ND Filter

[redwine]

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]

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.

 

[aungzawwin]

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

why not.. a CPL can also do it

 

[redwine]

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]

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

 

[redwine]

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:

 

[redwine]

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]

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.

 

[Numnumball]

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..

 

[redwine]

Thanks Sabee & Numnumball,

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

 

[night86mare]

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]

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.

 

[redwine]

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.

 

[wildcat]

http://www.clubsnap.com/forums/forumdisplay.php?f=84

82mm err... what lens you using arh?

 

[night86mare]

http://www.clubsnap.com/forums/forumdisplay.php?f=84

82mm err... what lens you using arh?

maybe he's planning for the sigma 8-16, which is SUPPOSED to be 82mm filter size, though i can't see how.

 

[redwine]

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.