Had a play about with my new Hoya R72 this weekend, on an A80. Got some decent shots, but having a few issues and wondered if anyone can shed some light on them?
Out of about 35 shots, 2 were sharp, well focussed and came out very nicely. However using the same technique the rest were all blurry to varying degrees. My workflow was as follows:
Set up tripod, attach filter, set custom white balance using grass.
Remove filter, compose shot and auto-focus then lock the focussing point, by pressing "MF"
Re-attach filter, set up exposure time at f/2.8
Take shot using 2 sec timer to eliminate any camera shake.
Test shots without the filter are sharp as expected, so the focus seemed to be right before attaching the filter. Any ideas on how to improve my technique? My current thoughts are to try auto and manaul focus through the filter, but not sure weither will be very successful, but I wonder if the filter is causing refraction, effectively changing the optical path and messing up the focus?
Out of about 35 shots, 2 were sharp, well focussed and came out very nicely. However using the same technique the rest were all blurry to varying degrees. My workflow was as follows:
Set up tripod, attach filter, set custom white balance using grass.
Remove filter, compose shot and auto-focus then lock the focussing point, by pressing "MF"
Re-attach filter, set up exposure time at f/2.8
Take shot using 2 sec timer to eliminate any camera shake.
Test shots without the filter are sharp as expected, so the focus seemed to be right before attaching the filter. Any ideas on how to improve my technique? My current thoughts are to try auto and manaul focus through the filter, but not sure weither will be very successful, but I wonder if the filter is causing refraction, effectively changing the optical path and messing up the focus?