cdninva
Member
Wondering if others have had similar findings: Newbie's new gear:
- Optics: Kowa 774 (straight) + DA10 adapter + Canon 50mm Mk1 f1.8 + 30D.
- Support: Carbon fiber tripod + pan head + D3 H-bracket
In two days at the park, I haven't gotten good focus or contrast on squat, whether a bird or a tree; even a woodpecker 30 ft away looked worse than if through a cheap zoom. It wasn't so much motion blur - I'm using remote and mirror lock - just inability to focus, period. (Scope alone looks fine.)
Today I put a mini-poster of 1951 resolution targets on a tripod in our parking lot. Same results, piss poor - until I took the DA10 adapter off, and swapped to my old "kit" 17-55. It's not an internal focus lens either, but now had physical room to focus and/or adjust focal length a bit.
I'd do as follows:
- Set the lens at 55, fully macro or infinity, up against the eyepiece;
- Focus the scope
- Shoot in MF
- Turn AF on, press half-way and confirm AF locked on
- Turn AF off, and shoot again.
More often than not, that second shot was a massive improvement as the lens front backed away from the eyepiece up to 1 mm. I could read "1951", no more than 1/8" high, from 50 ft at ISO 400, 800, even 1600 after dusk.
I am wondering if you folks with SLRs or especially P&S find this kind of combo-focusing useful.
Although more testing is to come, I'm also concerned about that 50mm Mk I. When I autofocus with it, the inner elements jump up with a "clink". It's not an image-stabilized lens. 'Also has a fair amount of dust in it, though no fungus. Suspect, you think?
- Chris in Virginia
- Optics: Kowa 774 (straight) + DA10 adapter + Canon 50mm Mk1 f1.8 + 30D.
- Support: Carbon fiber tripod + pan head + D3 H-bracket
In two days at the park, I haven't gotten good focus or contrast on squat, whether a bird or a tree; even a woodpecker 30 ft away looked worse than if through a cheap zoom. It wasn't so much motion blur - I'm using remote and mirror lock - just inability to focus, period. (Scope alone looks fine.)
Today I put a mini-poster of 1951 resolution targets on a tripod in our parking lot. Same results, piss poor - until I took the DA10 adapter off, and swapped to my old "kit" 17-55. It's not an internal focus lens either, but now had physical room to focus and/or adjust focal length a bit.
I'd do as follows:
- Set the lens at 55, fully macro or infinity, up against the eyepiece;
- Focus the scope
- Shoot in MF
- Turn AF on, press half-way and confirm AF locked on
- Turn AF off, and shoot again.
More often than not, that second shot was a massive improvement as the lens front backed away from the eyepiece up to 1 mm. I could read "1951", no more than 1/8" high, from 50 ft at ISO 400, 800, even 1600 after dusk.
I am wondering if you folks with SLRs or especially P&S find this kind of combo-focusing useful.
Although more testing is to come, I'm also concerned about that 50mm Mk I. When I autofocus with it, the inner elements jump up with a "clink". It's not an image-stabilized lens. 'Also has a fair amount of dust in it, though no fungus. Suspect, you think?
- Chris in Virginia