Search found 233 matches

by Peter De Smidt
Mon Jan 20, 2014 8:09 pm
Forum: Equipment Discussions
Topic: Gear head vs Ball head
Replies: 49
Views: 12404

I've had a 410 for a number of years. It's a very good head when careful alignment is helpful, such as for architecture or still life. Like any 3 way head, it's not very good for rapid framing, where a ball head would be a better choice. The 410 quick release plate is the best of the Manfrotto ones....
by Peter De Smidt
Thu Jan 16, 2014 9:33 am
Forum: Equipment Discussions
Topic: focusing rails
Replies: 17
Views: 6215

Velmex Unislide
by Peter De Smidt
Fri Dec 13, 2013 1:56 pm
Forum: Equipment Discussions
Topic: Really Right Stuff BH-55 LR + Stackshot
Replies: 10
Views: 2277

A photographer I assist for has a BH55 head. It is a terrific head: well made, smooth to operate, and sturdy. My main ball head is an Arca B1. I prefer the BH55. For general photography with a DSLR it would be terrific. If you get into really special use areas, there might be better choices, such as...
by Peter De Smidt
Sat Nov 16, 2013 10:16 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Leaf
Replies: 7
Views: 1816

Thanks.

Another day, another leaf picture:

Image
by Peter De Smidt
Fri Nov 15, 2013 10:09 am
Forum: Nature Photography -- Macro and Close-up
Topic: Tired of frogs yet? :P
Replies: 5
Views: 1010

Great photos!
by Peter De Smidt
Fri Nov 15, 2013 6:38 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Humidity/Temperature ?
Replies: 15
Views: 5693

I expect that low humidity would be the most important, as it would minimize chances of the lenses getting fungus. A stable moderate temp might also help.
by Peter De Smidt
Thu Nov 14, 2013 11:01 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Leaf
Replies: 7
Views: 1816

Here's one done at 1x with no stacking:

Image
by Peter De Smidt
Thu Nov 14, 2013 10:35 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Leaf
Replies: 7
Views: 1816

Image
by Peter De Smidt
Thu Nov 07, 2013 9:41 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Leaf
Replies: 7
Views: 1816

http://www.youtube.com/watch?v=gmRHTausFls

In this case, I kept the subject/film carrier fixed in place and used a Velmex Unislide to move the camera between exposures.

Image
by Peter De Smidt
Thu Nov 07, 2013 5:06 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Leaf
Replies: 7
Views: 1816

Clearly the right place for this would be the Studio and Technical section. Sorry about that.
by Peter De Smidt
Thu Nov 07, 2013 10:42 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Leaf
Replies: 7
Views: 1816

Leaf

Image

Nikon D600,
80mm Rodagon Reversed,
F5.6 on lens,
2x Magnification,
DSLR Scanner
by Peter De Smidt
Thu Oct 31, 2013 6:41 am
Forum: Equipment Discussions
Topic: a new small lens
Replies: 22
Views: 6447

For lens testing around 1-4x, I've found Edmund's hi res target to be very useful. I bought mine on Ebay for much less than the retail price, but I don't know how common they are there.
by Peter De Smidt
Thu Oct 10, 2013 1:01 pm
Forum: Equipment Discussions
Topic: Kowa Lenses?
Replies: 1
Views: 724

Kowa Lenses?

http://www.kowa-usa.com/kowanewweb/lenses/falenses.html Anyone have any experience with these? I have a Kowa 300mm lens that I use with my 8x10 camera. It's a very good lens. Kowa generally has a good reputation with LF photographers, which is admittedly a very different application than what we're ...
by Peter De Smidt
Tue Oct 08, 2013 12:17 pm
Forum: Equipment Discussions
Topic: Lens comparison near 1:1
Replies: 21
Views: 5186

Thanks, Rik!

Just for comparison: A 50mm Componon-2 reversed at 2x and f5.6 on the lens gave at least Group 6, Element 6 (i.e. 5792 spi) in one direction; and Group 7, Element 2 (i.e. 7298 spi) in the other direction. That's center resolution. I"m sure things are worse at the edges.
by Peter De Smidt
Tue Oct 08, 2013 11:55 am
Forum: Equipment Discussions
Topic: Lens comparison near 1:1
Replies: 21
Views: 5186

Would that indicate that a D5200, with 6000 samples over the long side of a DX-sized frame, and assuming that the system is still limited by the sensor, mean that I could expect about 4000 spi resolution if I switched to a D5200?