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Author Topic: dslr teething problems  (Read 2306 times)

Offline andydo

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dslr teething problems
« on: December 26, 2011, 03:59:15 PM »
iso=100 with a 15 second shutter it has let in way too much light but its the lowest iso ive got how do i get less exposure   http://img585.imageshack.us/img585/6283/boxingday2011018.jpg


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Offline Mick

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Re: dslr teething problems
« Reply #1 on: December 26, 2011, 04:05:04 PM »
Looks like you need a ND filter stuck on the front, that would help for this type of shot. 

They come in various sizes and densities, as you can see here,  ND Filters  ;)
« Last Edit: December 26, 2011, 04:09:01 PM by admin »
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Offline andydo

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Re: dslr teething problems
« Reply #2 on: December 26, 2011, 04:40:12 PM »
this might sound a bit thick but what density would i need
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Offline Graham

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Re: dslr teething problems
« Reply #3 on: December 26, 2011, 05:10:04 PM »
   Ok, you had a 15 second shutter speed at iso 100, what aperture were you set at? Your metadata says auto exposure.
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Offline Hinfrance

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Re: dslr teething problems
« Reply #4 on: December 26, 2011, 06:17:26 PM »
It says f32 in the EXIF, but with no exposure compensation. Very weird.

I'd have thought a snow scene ought to be around 1/250 at f8-f16 with 100 ISO in daylight.

Did you tweak the programme adjust wheel beyond the point where the camera could cope?
« Last Edit: December 26, 2011, 06:19:11 PM by Hinfrance »
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Offline andydo

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Re: dslr teething problems
« Reply #5 on: December 26, 2011, 06:26:38 PM »
all i did was adjus the shutter to 15 secs i thought the camera did the rest
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Offline Hinfrance

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Re: dslr teething problems
« Reply #6 on: December 26, 2011, 07:38:25 PM »
The camera can only do so much - with a minimum aperture available of f32, 15 seconds is way too long an exposure. If you want to take long exposures in bright conditions then you will need ND filters - see Admin's link above.

For the shot you have here I would guess than you'd need a 10 or a couple of 8s. Not cheap  :o
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Offline Alfonso_Frisk

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Re: dslr teething problems
« Reply #7 on: December 26, 2011, 08:23:09 PM »
As H says, 15 seconds seems a lot.
What were you trying achieve? Milky water effect? if so a couple of secs may have given you that,
Invest in some ND grads or one of those vari-grads from 7dayshop.com
http://www.7dayshop.com/catalog/product_info.php?cPath=777_1&products_id=111253
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Offline Oldboy

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Re: dslr teething problems
« Reply #8 on: December 26, 2011, 09:17:29 PM »
all i did was adjus the shutter to 15 secs i thought the camera did the rest

Didn't the camera top plate screen or what you see at the bottom/side when looking through the view-finder flash at you? It should do this to indicate the setting you have choosen will result in under or over exposure. After taking the shot you need to view the histogram, this will show if it's over or under exposed, allowing you to retake the shot after making adjustments as required.  :tup:

Offline andydo

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Re: dslr teething problems
« Reply #9 on: December 26, 2011, 10:00:17 PM »
yeah i was trying to get the milky effect with my old camera 4 seconds didnt seem long enough but i was told a while back that it needs to be 15 seconds now obviously this is way too long  :'(  also the flashing you were on about oldboy i did see something flash but a bit of dslr beginners eagerness kicked in so i didnt read up on this i just used my old camera experience  :-[
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Offline Oldboy

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Re: dslr teething problems
« Reply #10 on: December 26, 2011, 10:35:25 PM »
yeah i was trying to get the milky effect with my old camera 4 seconds didnt seem long enough but i was told a while back that it needs to be 15 seconds now obviously this is way too long  :'(  also the flashing you were on about oldboy i did see something flash but a bit of dslr beginners eagerness kicked in so i didnt read up on this i just used my old camera experience  :-[

All been there and done that.  :doh:

What I do, is put the camera in manual mode, Select the higest F number, in this case, F32, then adjust the shutter speed until ISO 100 is displayed. This might mean your lowest shutter speed might be six seconds. To get a lower shutter speed you need to use a ND or Polariser Filter. I have the Cokin filter holder, which can take a Polariser plus 2 ND's. If you don't want to spend any more money the suggest you wait until late even or early morning, as light levels are reduced so, instead of six seconds, as outlined above, it might go down to 15 or 20 seconds.  ;D

Offline andydo

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Re: dslr teething problems
« Reply #11 on: December 27, 2011, 12:18:58 AM »
ive got a polariser so next time im ower that way on i'll give ur advice a try cheers
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Offline Geoff I

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Re: dslr teething problems
« Reply #12 on: December 27, 2011, 08:41:12 AM »
Instead of buying an expensive ND filter you could try a welding glass these are very cheap and you may get the effect you are after.

http://www.amazon.co.uk/Dark-Glass-for-Welding-Mask/dp/B0051OD4OE/ref=sr_1_12?ie=UTF8&qid=1324975042&sr=8-12

You could buy or use the hood for your lens and tape the welding glass to it.

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Re: dslr teething problems
« Reply #13 on: December 27, 2011, 01:38:27 PM »
What size lens ( look on the back of your lens cap ) are you using as I have quite a few odd sized filters at the shop which I never use as most of my lenses are 77mm. So if I have anything to fit yours that I don't use you are welcome to them.

Offline andydo

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Re: dslr teething problems
« Reply #14 on: December 28, 2011, 01:34:06 PM »
dave they are 58mm or 62mm cheers for the offer though i appreciate it

andy
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