Camera Craniums: The Photography Community for Enthusiasts

General Category => General Photography => Topic started by: andydo on December 26, 2011, 03:59:15 PM

Title: dslr teething problems
Post by: andydo 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
Title: Re: dslr teething problems
Post by: Mick 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
  ;)
Title: Re: dslr teething problems
Post by: andydo on December 26, 2011, 04:40:12 PM
this might sound a bit thick but what density would i need
Title: Re: dslr teething problems
Post by: Graham 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.
                                Graham.
Title: Re: dslr teething problems
Post by: Hinfrance 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?
Title: Re: dslr teething problems
Post by: andydo 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
Title: Re: dslr teething problems
Post by: Hinfrance 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
Title: Re: dslr teething problems
Post by: Alfonso_Frisk 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
Title: Re: dslr teething problems
Post by: Oldboy on December 26, 2011, 09:17:29 PM
Quote from: andydo 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

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:
Title: Re: dslr teething problems
Post by: andydo 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  :-[
Title: Re: dslr teething problems
Post by: Oldboy on December 26, 2011, 10:35:25 PM
Quote from: andydo 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  :-[

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
Title: Re: dslr teething problems
Post by: andydo 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
Title: Re: dslr teething problems
Post by: Geoff I 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.
Title: Re: dslr teething problems
Post by: skellum 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.
Title: Re: dslr teething problems
Post by: andydo on December 28, 2011, 01:34:06 PM
dave they are 58mm or 62mm cheers for the offer though i appreciate it

andy
Title: Re: dslr teething problems
Post by: andydo on December 28, 2011, 01:38:53 PM
whoops i read that wrong dave i though you said you had spare 77mm   :doh:  mine are 58 or 62mm the 58mm is the 18-55mm kit lens and the 62mm is a tamron 70-300mm

andy
Title: Re: dslr teething problems
Post by: skellum on December 28, 2011, 02:13:50 PM
I am back at the shop tomorrow so I will have a look for you
Title: Re: dslr teething problems
Post by: andydo on December 28, 2011, 08:47:29 PM
nice 1 cheers   ;D