Here is a summary or excerpt from an article that has just been published on DPNow:
Understanding lens apertures can be the key to unlocking a new level of photographic prowess for budding photographers. The aperture settings you choose dictate exposure, what's in focus, image quality and much more. This extensive article with nearly 30 illustrations, leads the reader through the wonders of aperture, f/stop, f-number and much more.
Only had a quick skim through the article, but looks like a very commendable and comprehensive piece which is long overdue and will be useful to lots of newcomers and regulars alike.
Might also be worth reminding people of this site which your article reminded me of.
Only had a quick skim through the article, but looks like a very commendable and comprehensive piece which is long overdue and will be useful to lots of newcomers and regulars alike.
Might also be worth reminding people of this site which your article reminded me of.
Happy Easter Stephen and GREAT to have you back!
I'm sure you have a lot of getting better still to do, but we have all been thinking of you and I hope you are doing what you are being told to do and ensuring your recovery goes as well as can be expected!
O ohhh the last one about vignette's did not go down too well with some people, and I did try to defend the post
Hello Stephen glad to see you back posting
Ash.
... nearly 30 illustrations, leads the reader through the wonders of aperture, f/stop, f-number and much more.
Those pics showing the diaphragm blades of the lens, first page, are brilliant! I mean the ones showing the opening at each aperture and also the one at the top, good enough to count the actual blades.
Did you take the pics yourself and, if so, how did you do it?
Those pics showing the diaphragm blades of the lens, first page, are brilliant! I mean the ones showing the opening at each aperture and also the one at the top, good enough to count the actual blades.
Did you take the pics yourself and, if so, how did you do it?
Pol
Yes, I produced all the illustrations.
The first picture of the lens to show the aperture iris was taken using flash on the camera bounced off the ceiling. Getting the angle right to minimise the reflections was the main challenge.
In the series to show the different aperture sizes I used one flash on the camera and one behind the lens, reflecting off some white background.
O ohhh the last one about vignette's did not go down too well with some people, and I did try to defend the post
Hello Stephen glad to see you back posting
Ash.
Hehe, like VW Beatles, either you love them or hate them, but it's still a classic
The first picture of the lens to show the aperture iris was taken using flash on the camera bounced off the ceiling. Getting the angle right to minimise the reflections was the main challenge.
In the series to show the different aperture sizes I used one flash on the camera and one behind the lens, reflecting off some white background.
Ian
Thanks. I think I can see your reflection in the first picci.
What I'd been wondering was how you'd kept the iris open at the various different apertures so you could photograph the actual aperture opening.
David eventually demonstrated how it can be seen by taking it off A and using the ring. (I can be a tad fick at times. )
Thanks. I think I can see your reflection in the first picci.
What I'd been wondering was how you'd kept the iris open at the various different apertures so you could photograph the actual aperture opening.
David eventually demonstrated how it can be seen by taking it off A and using the ring. (I can be a tad fick at times. )
Pol
I could not have demonstrated the aperture sizes like I did with the lens off the camera with a modern lens. For a start with they don't have aperture rings and they often require electrical connections to operate the lens iris. So I used a 30+
year old Olympus OM lens.
I could not have demonstrated the aperture sizes like I did with the lens off the camera with a modern lens. For a start with they don't have aperture rings and they often require electrical connections to operate the lens iris. So I used a 30+
year old Olympus OM lens.
Ian
Yes, I was't very popular with David. He had to dig out one from his collection of ancient Pentax clutter for the demonstration.
All about lens apertures
Re: All about lens apertures
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