Originally posted by WPRESTO Stopping down to ~f20 may gain some DOF but at some loss of IQ because of diffraction. You might be better at about f8 to f11. Not knowing what kind of flash you're using, it's hard to advise on output adjustment. I would go with manual flash, not pTTL and start testing @ about 1/8 power or less. Kick up the ISO rather than boosting the flash output. Run tests before hand, approximate the distance somewhere else and fire off shots to determine what flash output & ISO are correct. The smaller the flash output, the shorter the duration of the flash and the better the motion-stopping will be. At full power, most strobes have a duration of about 1/1000 second. As the power output is reduced the flash duration goes to 1/2000 at half power, 1/4000 at 1/4 power, and so forth. Most modern flash units with a variable manual output will go to at least 1/16,000 second, some to 1/128/000 of a second. With near black conditions, you should get decent reduction of motion blur once the flash output goes to about 1/8 power or less.
Thanks for those suggestions WPRESTO. Scrutinising my pics I think there is both motion blur, and the tits were flying out of the plane of focus. I browsed through the K5 user manual and googled a bit to see if there was any spec on the on board flash duration but nada - does anybody know?
Anyway I took along my vivitar 283 which has power adjust and set it to the lowest setting. The chicks are ready to fledge " MOM - we're outta here!!" F16, 250mm tamron adaptall 200-500mm SP 31A
Then one of the chicks was on it's way, fluttering to the ground (was he pushed??
). This seemed like it might be bad, there are various predators just waiting for free snacks. But I couldn't stay to see what transpired. The next day the nest was quiet, chicks and tits were all gone!
Meanwhile, there was a cormorant on this raft down the estuary. I see one here every so often, usually when the tide is in, but normally they hang out on another one in the river near the RSPB reserve. This one just waiting for the tide I guess. 500mm f11.
One thing I've learned about the 31A is that it doesn't like backlighting/reflected light. Fringing and purpling swiftly appears, resolution drops. The novoflex is significantly better in that respect. I pp'ed these shots as best I could, if it's bad dropping luminence and saturation for purple and adjacent colours in LR tends to be the best/only option.
This rabbit was browsing in front of the main viewing window at one of the hides, oblivious. Through the glass, monopod, ~250mm, f11. The jackdaw was on its own mission - 500mm, cropped.
The great crested grebe chicks are doing well, but are most reluctant to come into good pic taking range (I defer to you zzeitg). The swans and cygnets were cruising around again with less concern. These not a direct comparison with the
previous cygnet pics with the novoflex, those were taken close enough to be whole frame, these are crops, but for what its worth, if the light situation is favourable I think the 31A is sharper. See rabbit above, and the 100% crop of the swans head below is its own advertisment. 500mm f11.
Finally, just for once I had a clear view of a reed warbler, normally heard (very!) but not seen.
Last edited by marcusBMG; 06-04-2016 at 04:24 PM.