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01-16-2023, 02:09 AM   #16
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QuoteOriginally posted by AstroDave Quote
It wants to know what focal length to use for shake reduction calculations. If you have that turned off, it's irrelevant.
Good to know, I never knew it was (just) about calculating SR!
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01-23-2023, 11:35 AM   #17
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Try that with a manual zoom, you have to have a guess at what focal lenght to put in, I would go for the longest.
01-23-2023, 12:08 PM   #18
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When I use my Adaptall II zoom lenses on my K3, I use the mid point - i.e. for the 70 - 210, I choose 140 (210 + 70 = 280, divide by 2 = 140). Maybe not mathematically accurate, but seems to work for me.
01-23-2023, 01:43 PM - 1 Like   #19
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QuoteOriginally posted by pentasonic49 Quote
Try that with a manual zoom, you have to have a guess at what focal lenght to put in, I would go for the longest.
That may be the worst option.

Pictures taken using the mid or lower FL range will be over-compensated by the SR mechanism if you enter a longer FL setting in the SR menu.. Best advice is to use either the actual FL, or failing that, the lowest FL or the mid range with a bias toward the lower.

Registering a lower FL than the one in use may lead to a less than ideal SR response, but it wont induce shake. Registering a longer FL can do just that

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