Long exposures with no filters

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kelvinjay
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Posted Mon Apr 8, 2013 10:34AM
A friend linked me this article this week:

Long exposures with no filters

I bought a 10 stop filter earlier in the year, which I've been pretty pleased with, but long exposures can lead to a lot of hot pixels. True, Lightroom tends to zap them automatically, but this technique outlined above seems to be pretty useful, so I thought I'd share it.

Also, the site has some other useful tutorials here
wdstock
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Posted Mon Apr 8, 2013 11:04AM

Interesting, but how the heck would you do "12 second exposures" on a bright sunny day?
kelvinjay
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Posted Mon Apr 8, 2013 11:51AM
Oh yeah, it has its limitations no doubt. I guess that something like 50ISO, f/16 and shorter exposures may be doable with a much brighter filter. But for dusk / night time, it looks like an interesting alternate technique.

(Edited on 2013-04-09 04:36:59 by kelvinjay)
Bike_Maverick
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Posted Mon Apr 8, 2013 12:16PM

Another limitation is that you will need a very sturdy tripod to get consistent results with this technique - you can't afford your camera to move even a milimiter between shots (and shutter clicking would most certainly do that unless your tripod's cost is in 400-500 region). For comparison, ND filter is only 150$ or so.


Don't see a problem with hotpixels - I manually remove them and it doesn't take more than few minutes. I use ND filter pretty regularly.
KolaczanCLOSED
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Posted Mon Apr 8, 2013 3:40PM

one benefit is that you can buy a less extreme ND filter (like 2 or 3 stop instead of 10) and just take multiple exposures and average them. Then you have an ND filter that is useable for other things (like slowing down your shutterspeed for video on bright days) as well as for fuzzy water effects. Would work when you don't have alot of available light too (like overcast days, sunrisr/sunset etc.) so you aren't doing a 20 minute exposure when you do't want to.


 


Overall, I think it is a really useful technique. Certainly wouldn't dismiss it out of hand.
Bike_Maverick
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Posted Mon Apr 8, 2013 5:11PM
So you don't want 20 minutes exposure but you want 20 1-minute exposures with lots of post work to blend them together (not to mention the tripod issue)? Well, sure, why not. Count me out though
TexPhoto
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Posted Mon Apr 8, 2013 5:37PM

This technique can be useid a lot of different ways.  i use it to capture lightning, taking 30 second exposures continuously for 10 or 20 minutes.  Then combine some or all the pics choosing which have the best looking lightning.


In fact thats one serious advantage, the ability to remove one or more photos that have something unwanted, like another photographer's flash.


And of course there is no filter color cast, wide angle vigneting, or reflections when using "no filter".  I find even my high quality filters yield problems when I include the sun.
JasonDoiy
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Posted Mon Apr 8, 2013 11:39PM
cool thanks for sharing
Willowpix
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Posted Tue Apr 9, 2013 6:06AM
Good stuff! Thanks, Kelvin.
SamBurt
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Posted Wed Apr 10, 2013 3:58PM
Cool! I can't wait to try this out. cheers!
kelvinjay
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Posted Thu Apr 11, 2013 9:31AM
Sort of on topic...

I've just finally got round to redoing all the interesting photo site links here in the sticky thread:

Useful photo & lighting sites, links & tips

So please check it out and add them to your browser bookmarks / favourites.

The next thing I want to do is to add some new links to the Photo Tutorial part of the sticky.

I'm sure some people would appreciate the chance to try some new techniques, so I'd love you all to post any links you have to your favourite tutorials whether it's the ultimate removing CA tip, how to create perfect skin or how to shoot lightning without getting struck, for shooting or post processing, we'd love to be able to collect together links to all the good ones.

Please post any suggestions in the sticky thread.

(Edited on 2013-04-11 09:32:13 by kelvinjay)
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