Manual F-Stop and D90 experimenting..

BMFM FILMS

Well-known member
I'm sure this has been covered, but incase it hasn't, I have my 50mm prime lens at F1.8 and finally noticed that you can do a manual F-Stop, without touching the aperture ring.

Solution: Get off Live-View, make sure you're in manual, set F-Stop to what you prefer, switch back to live view, and you'll see a difference.

I'll post examples, but I went from super shallow F 1.8, then tuned it to F22, and it brought a hell of a lot of noise, but it was truly F22 because the aperture was nearly closed.

Like I said I'll post examples when I get a chance.

So, it would appear that D90 plays with the shutter speed/ISO automatically when you do not touch the EV buttons. Clearly when I went to F22, the ISO rose above 2000-3200 (I can't gauge it but its an assumption).

Again I apologize if this has been covered it's just a series of experimentations.

If Nikon could only give us manual control of the Iso/Shutter Speed and a much higher set Bit-Rate, D90 would be a beast.
 
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F1.8
3102461997_59fa9f22c9_b.jpg

F22

Screengrabs kinda suck, ignore the difference in size, but u can see the noise difference. I'll post better ones to get point across.
 

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