#1. "RE: What should my concern's be now !!" In response to Reply # 0
Manual mode on your dial only affects the settings the camera uses (aperture, shutter-speed etc). The manual setting on the lens means that auto-focus is disabled. If you are using the AF-S 1.8 35mm Nikkor/Nikon, the auto-focus allows you to make manual adjustments while staying in AF mode... so basic logic says its designed to be okay with manual fidgeting.
Unless what you described above doesn't match my first paragraphy, you should be fine.
If you are using a different lens and it gives you resistance when you try and turn the manual focus ring in AF mode... you're more likely to hurt the lens than the camera, as far as I can tell.
Your really in danger if you let someone CHANGE lens' for you (i.e. if they know less than you about how to do so) and its not good to leave the camera powered on when you change lenses.
#3. "RE: What should my concern's be now !!" In response to Reply # 2
Based on what you're describing you set the camera to manual mode which just means that you set the aperture and shutter speed manually. This has nothing to do with your lens autofocus setting being on or off. Seems to me you have nothing to worry about.
#4. "RE: What should my concern's be now !!" In response to Reply # 1
>Manual ... and its >not good to leave the camera powered on when you change >lenses.
Snap, snap - could you or someone else expand on this statement. I have never worried if the camera was on or off while changing lenses. My initial thoughts are, Surely modern cameras are idiot proof in this manner? However, I could be wrong. I would be interested in knowing what can happen to the camera or lens, if left on while changing lenses.?
Also, to the OP. I also recall reading something in the manual about turning the auto focus, (the switch on the bottom left, next to the lens) to manual if you set the lens to manual. I assume this is the stop the lens and camera from fighting each other.
The 35mm 1.8 DX lens, like most newer lenses allows manual override in adjusting focus, while in auto focus mode on the camera. Your camera and lens should be fine.
#5. "RE: What should my concern's be now !!" In response to Reply # 4
>>Manual ... and its >>not good to leave the camera powered on when you change >>lenses. > >Snap, snap - could you or someone else expand on this >statement.
The manual also clearly states “Be sure the camera is off when removing or exchanging lenses” (page 26).
Lenses and cameras now have sensitive electronic components that could be potentially damaged by power surges. There is a potential for such surges or shorts when exchanging lenses. Although I (as well as others I imagine) have accidentally changed lenses while forgetting to turn off the camera without ill affect, but why take the chance if you do not need to.
Also I must ashamedly admit I never read the part about switching the camera M/A switch to M when switching the lens to M. I never did and have not experienced any ill affect that I know of. I wonder if that advice pertains more to screw-drive rather than AF-S lenses that have a manual position also like my Tamron 90mm Macro to prevent possible damage to the coupling and drive motor should the lens not properly decouple from the camera drive. Would be interested in hearing from someone more knowledgeable about why one needs to set the lens and camera body to M.