Also, another question - in strong, normal daylight, ISO 200, 55mm, Shutter Sp 125, getting as close to subject as I can and still get the "OK" beep when I focus, I can't get Ap to open up any more than 5.6. Why is that? Sorry if it's a stupid question and thanks for help!
Not getting sharp focus at full resolution with brand new D3300
- Thread starter Ruby Gold
- Start date
captain birdseye
Senior Member
The light entering the lens reduces a little if you get really close, a lot of macro lens users notice this when shooting at minimum focus distance wide open where they select f2.8 and the camera shows f3.5.
there is nothing wrong.
there is nothing wrong.
captain birdseye
Senior Member
You should be able to manually move your focus point to where you want it without taking you eye off the subject.
I cannot recommend the focus and recompose method at wide apertures or at all but maybe thats just me but when I moved up from the 6mp d100 to the 12mp d90 I quickly found the shortcomings of this method for close up work.
[h=3]Nikon D3300 AF-Area Modes - Dummies.com[/h]
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Horoscope Fish
Senior Member
Because the 18-55mm is a variable aperture lens. Look at the gold print on the lens barrel. You see where it says "1:3.5-5.6", right? That's the aperture range of that lens: f/3.5 to f/5.6 and that lens can only open up to f/3.5 at its widest focal length of 18mm, or very close to that. As soon as you begin to zoom in, the maximum aperture it can achieve will get smaller until it reaches f/5.6 where it will stop decreasing based on focal length. This is common for zoom lenses; as focal length INcreases, maximum aperture DEcreases. At it's maximum focal length of 55mm that lens will have a maximum aperture of f/5.6 no matter what.
Constant aperture glass does not do this but it's also more expensive typically speaking. For example my Tamron 70-200mm f/2.8 is constant aperture, it has a maximum aperture of f/2.8 across the entire focal length. But believe me... I paid dearly for that.
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1. Focus and recompose will not work at shorter distances, especially with lens wide open due to DOF being narrow and any shift may result in out of focus. A better method is to select the focus point nearest to where you want to focus and take the shot
2. The maximum aperture of 18-55 at 55mm is 5.6, so you can never get it lower.
2. The maximum aperture of 18-55 at 55mm is 5.6, so you can never get it lower.
Horoscope Fish
Senior Member
Suggested Reading: The Problem With the Focus and Recompose Method