#1  
Old 13-11-2009, 05:04 PM
AdrianF's Avatar
AdrianF (Adrian)
Currently Scopeless

AdrianF is offline
 
Join Date: Sep 2007
Location: Moura Qld
Posts: 1,774
Memory cards

I am having a few issues with CF memory cards and my 350D. If I take a 5 min exposure it takes about 2 1/2 mins before it finishes writing to the card and I can image again, is this normal? The card I am using is a SanDisk Ultra II at 15MB/s and the images,in RAW, are 10 - 11 meg long.

Adrian
Reply With Quote
  #2  
Old 13-11-2009, 05:20 PM
supernova1965's Avatar
supernova1965 (Warren)
Buddhist Astronomer

supernova1965 is offline
 
Join Date: Aug 2009
Location: Phillip Island,VIC, Australia
Posts: 4,073
that sounds odd you could backup your photo's and have your camera format the card that may fix the problem
Reply With Quote
  #3  
Old 13-11-2009, 05:48 PM
troypiggo's Avatar
troypiggo (Troy)
Bust Duster

troypiggo is offline
 
Join Date: Nov 2008
Location: Brisbane, Australia
Posts: 4,846
Do you have in-camera noise-reduction on or off?
Reply With Quote
  #4  
Old 13-11-2009, 06:04 PM
AdrianF's Avatar
AdrianF (Adrian)
Currently Scopeless

AdrianF is offline
 
Join Date: Sep 2007
Location: Moura Qld
Posts: 1,774
Quote:
Originally Posted by supernova1965 View Post
that sounds odd you could backup your photo's and have your camera format the card that may fix the problem
I always format the card after every session, after backing everything up of course, so I always start with fresh card. I bought this new in September and I think it's been formatted about 6-7 times.

Adrian
Reply With Quote
  #5  
Old 13-11-2009, 06:18 PM
AdrianF's Avatar
AdrianF (Adrian)
Currently Scopeless

AdrianF is offline
 
Join Date: Sep 2007
Location: Moura Qld
Posts: 1,774
Quote:
Originally Posted by troypiggo View Post
Do you have in-camera noise-reduction on or off?
Noise reduction was on I have now turned it off. I didn't realise it was even on. I assume it makes a difference because it processes the files first before it sends to the card? Excuse my ignorance.

Adrian
Reply With Quote
  #6  
Old 13-11-2009, 06:33 PM
erick's Avatar
erick (Eric)
Starcatcher

erick is offline
 
Join Date: Dec 2006
Location: Gerringong
Posts: 8,532
It should actually take a dark of the same exposure time, then process the image with the dark and then write the resulting file to disk. That's what I understand, anyway.
Reply With Quote
  #7  
Old 13-11-2009, 06:59 PM
troypiggo's Avatar
troypiggo (Troy)
Bust Duster

troypiggo is offline
 
Join Date: Nov 2008
Location: Brisbane, Australia
Posts: 4,846
With ICNR on, your camera is effectively taking darks in-camera. That's what's taking all that extra time. With ICNR off, it just takes the light image and downloads it. Much quicker.

It's up to you to use ICNR on or off, but if you choose off you'll have to take darks manually.
Reply With Quote
  #8  
Old 14-11-2009, 01:35 PM
Chris Southby (Chris)
Registered User

Chris Southby is offline
 
Join Date: Mar 2009
Location: Canberra, Australia
Posts: 61
I didn't even know the 350D (I have one) had in camera noise reduction. Where is it in the menus to turn it on or off? Cheers

How effective is using in camera noise reduction as opposed to taking darks
Reply With Quote
  #9  
Old 14-11-2009, 03:16 PM
troypiggo's Avatar
troypiggo (Troy)
Bust Duster

troypiggo is offline
 
Join Date: Nov 2008
Location: Brisbane, Australia
Posts: 4,846
Pretty sure it's a custom function on the 350D. Have a look through those.

As for ICNR vs darks, I believe the result is the same - if you take the same number of darks as lights. I've adopted the theory that I'd rather take many more lights, and might take 10-20 darks only and make a master of those. Saves time. Plus you can take darks after you've taken your camera off scope as long as temperature etc similar, whereas ICNR is taken after every shot. Think that makes sense...
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 08:30 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
Bintel
Advertisement