There is nothing about a "Discovery Mode" in the D40 manual. I am not sure if this will work, but try resetting the camera to its default settings. Push the menu button on the left side of the LCD and scroll down to the pencil symbol. You will find an item on that menu called "Reset". Once you do the reset, see if the "Discovery Mode" is there. Frankly, I think you would be much better off if you read the D40 manual. In case you lost yours, I have attached a link where you can download it in pdf format.
SOURCE: nikon d40 digital camera
So, before i take my d40 to an authorized tech, should i maybe see if the lense needs to be cleaned then? silly question I know. But i really dont want to waste money on sucha petty problem.
SOURCE: Nikon D40 won't autofocus
Which lense are you using?
Non AF-S and non AF-I lenses will not autofocus at all
The old 300 mm f/4 AF has to be put in the M position to focus and it only focuses manually.
let me know
good luck
SOURCE: Nikon D40
Hey climiocid,
If what you mean is your images don't display on the LCD screen after you take the picture your image review option has most likely been turned off. If your camera just never displays any images I would try doing a hard reset on the camera by shutting off the camera and opening the connecter cover and pressing the reset button which should reset the camera to factory specifications. When resetting the camera this way remember this resets the cameras' clock. If none of this works I would have the camera looked at by an authorized service technician. You can find an authorized service center by contacting the manufacturer, or you can always bring your camera to a Geek Squad® precinct in a Best Buy™ store and they can send it out for service. I hope this helps!
Sincerely,
Allan
Go Ahead. Use Us.
SOURCE: can you use nikon sb25 flash with d40 dslr?
You can but with limitations;
Save me explaining,please read this http://forums.steves-digicams.com/nikon-dslr/137618-sb-25-d40-non-ttl-auto-mode.html
SOURCE: Nikon D40 SLR 6MP 18-55 Lens
Hi,
Basic idea is to replace the infrared-cut filter in front of the CCD sensor with an infrared filter, so the camera only "sees" the light in/above near-infrared range (mostly invisible to human eye).
The operation on a d40 is a bit fiddly. You will of course need a replacement infrared filter. You can cut it yourself from a standard lens infrared filter (that's what I normally do). It might then need some positioning to get autofocus to work properly in case the replacement filter is not the same thickness as the original one.
I've actually just found this tutorial on the net, you might find it useful:
http://photocamel.com/forum/nikon-forum/58248-nikon-d40-infrared-conversion-tutorial.html
Good luck,
Raf
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