#1  
Old 07-12-2007, 08:26 AM
Omaroo's Avatar
Omaroo (Chris Malikoff)
Let there be night...

Omaroo is offline
 
Join Date: Aug 2006
Location: Sydney/Cooma
Posts: 7,628
IR-modded Nikon D40

I've been very pleased with the D40's performance over the past few months that I've owned it. The 30-sec captures of 47Tuc, Eta Carinae, etc I've done a while ago convinced me that it has potential as the CCD is certainly very sensitive and the noise characteristics are very good too - somewhat better than some older Nikon varieties like the D50/70 I've seen in the (near) past. "Mode 3" on the D40 (turn power off before the noise algorithms are applied) works well to produce a pretty-much proper RAW file - a nuisance but it works. IR filtering is pretty aggressive though - like recent DSLR's from most manufacturers. Ha stuff such as B33 Horsehead is a killer.

I've just come across a company in the USA called MaxMax that can do an IR+Visible mod on a D40 for US$450 plus shipping. That sounds pretty good to me as I can still use it for visible light work with a CC1 filter attached.

Has anyone used these guys before? I'm really tempted, and once the camera arrives at their place they turn it around in 1-2 days. Also - as a more general question, how do these mods leave the basic functionality of a camera for daily terrestrial use?

http://www.maxmax.com/nikon_d40.htm

Here's another place too: LifePixel - http://www.lifepixel.com/shop/cart.p...ct_detail&p=49 and they do it for US$350.00 for a IR+Visible mod.

Last edited by Omaroo; 07-12-2007 at 10:10 AM.
Reply With Quote
  #2  
Old 08-12-2007, 11:11 AM
Omaroo's Avatar
Omaroo (Chris Malikoff)
Let there be night...

Omaroo is offline
 
Join Date: Aug 2006
Location: Sydney/Cooma
Posts: 7,628
I can see that this subject simply entralls everyone.

I've heard back from a bunch of people on CN, and the two main answers I get are theses:

1) Go and order the Full Spectrum (UV/IR/Visible) clear glass filter from LifePixel and do the mod myself. It isn't hard, and with an external UV/IR filter it will still work beautifully for terrestrial photography - albeit with a slightly different white point. That's OK as I usually take RAW anyway.

2) Simply remove the existing filter and leave the sensor bare - i.e. do't replace the existing IR filter with a clear one. The argument is that an overlay filter will trap dust bunnies behind it, while a bare sensor is easy to clean (they are still covered in optical glass).

I like answer *1 as the clear Full Spectrum filter lets the autofocus still work. Without it the autoficusing systems go out of calibration.

So! Time to order the filter - US$95.00 plus shipping.
Reply With Quote
  #3  
Old 08-12-2007, 12:21 PM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,709
What will you use for terrestrial photography afterwards? Is it guaranteed to get the colour balance right with a filter?

I'd love to mod my 350D but I'd prefer to have a second one dedicated to astro use.
Reply With Quote
  #4  
Old 08-12-2007, 12:25 PM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 10,897
Sounds like you've got yourself a challenging project for the Xmas break Chris! I think the lack of responses is more indicative of the sheer feeling of dread and terror welling up in the pit of the stomach at the though of modding one's own (expensive) DSLR!

Good luck; hope you’ve got a steady hand, good eyes and a sharp soldering iron.

Cheers

Dennis
Reply With Quote
  #5  
Old 08-12-2007, 12:59 PM
citivolus's Avatar
citivolus (Ric)
Refracted

citivolus is offline
 
Join Date: Sep 2007
Location: Carindale
Posts: 1,178
I bought my filter from LifePixel for my 10D mod. Their instructions were straightforward and I had no real issues other than the application of the silicone to hold the filter in place. I had to pull the filter out several times and give it a thorough cleaning to remove misplaced adhesive.
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 10:30 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Lunatico Astronomical
Advertisement
Celestron Australia
Advertisement
Meade Australia
Advertisement
OzScopes Authorised Dealer
Advertisement
SkyWatcher Australia
Advertisement
NexDome Observatories
Advertisement
Astronomy and Electronics Centre
Advertisement