How did you get a focal length of 960mm?
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AlanF said:How did you get a focal length of 960mm?
AlanF said:I thought you had found a 1.6xTC. It is still a 600mm lens. The 5DS sensor has the same size pixels as the 7D and so has the same theoretical resolution. 600mm doesn't magic into 960mm focal length when you put it onto a 5DS instead of a 5D3. The effective field of view on the crop is that of a 600mm lens, not the effective focal length.
AlanF said:Nice shots, and very sharp on a 7D. With the 150-600 you won't have to zoom with your feet, which should save your ankle.
dpc said:AlanF said:How did you get a focal length of 960mm?
7D is a crop sensor camera, so the effective focal length of the 150-600mm Sigma at the long end is approximately 1.6x600 = 960mm
dpc said:I decided to try some manual focus with this lens. The first picture was taken handheld at 600mm, f/6.3, ISO100, 1ev and 1/400second. The second picture was taken handheld at 361mm, f/5.6, ISO100, -0.67ev and 1/640second. I used the viewfinder, not the LCD screen. The lens is obviously not designed for manual focus. The focus ring is tiny and not very 'sensitive' to fine gradations of focus. Still, you can manually focus it handheld and get decent results as long as you are dealing with a fairly static subject and don't expect a high keeper rate. It worked much better than I expected.
FramerMCB said:dpc said:I decided to try some manual focus with this lens. The first picture was taken handheld at 600mm, f/6.3, ISO100, 1ev and 1/400second. The second picture was taken handheld at 361mm, f/5.6, ISO100, -0.67ev and 1/640second. I used the viewfinder, not the LCD screen. The lens is obviously not designed for manual focus. The focus ring is tiny and not very 'sensitive' to fine gradations of focus. Still, you can manually focus it handheld and get decent results as long as you are dealing with a fairly static subject and don't expect a high keeper rate. It worked much better than I expected.
Not being a gardener, I don't know the first flower in these 2 shots, but you did a masterful job in my opinion on composing and capturing their essence. Excellently focused too! Thanks for sharing.