Go Back   Steve's Digicams Forums > Digital Cameras (Point and Shoot) > Panasonic / Leica

Reply
 
Thread Tools Search this Thread
Old Oct 24, 2006, 11:40 AM   #21
Senior Member
 
tchuanye's Avatar
 
Join Date: Feb 2003
Posts: 1,279
Default

Narmer wrote:
Quote:
Well Tan, looking at Sven's tables I am not sure anymore of my statement.

Looking at the last tables in his page
http://people.freenet.de/seemolf/achromats.html#start

At F/8 on FZ5:0

+4,5 @ 4x has 8 mm DOF
+ 8 @ 4x has 2,7mm DOF

+4,5 @ 12x has 1,2mm DOF
+ 8 @ 12x has 0,4mm DOF

There is more than 7 times more DOF from 4x to 12x.
Considering that 6-7x Zoom is less than the middle between 4 and 12x, we might have something like this:

+4,5 @ 12 x has 1,2mm DOF
+ 8 @ 6,5x has 2 mm DOF
(5 times +8 diopter's DOF at 12x, nearly twice than +4,5's DOF at 12x).

thus double DOF (which heavily depends on focal provided by zooming, rather than diopter, IMO), but I am not so sure of this (might be less or even more, for these are generally logarithmic curves).
I don't know the exact formula to calculate DOF extension.

Francesco

Well, Fraf, I think your statement was right.

The +8 has abit more DOF than the +4.5 setup. Thats news to me!

Anyway, formula aside, I think as long as we are happy with the shots we get, thats the most impt! The science behind just tells us why they turn out that way! And in this case, it means I can shoot the Raynox at wider zoom for larger insects too!

Thanks so much for the info! (and to Sven too!)
tchuanye is offline   Reply With Quote
Old Oct 24, 2006, 12:15 PM   #22
Senior Member
 
tinosa's Avatar
 
Join Date: Feb 2005
Posts: 542
Default

Fantastic photography as usual Tchuanye !
What an elegant bird, obviously very light weight.
Thank you
tinosa is offline   Reply With Quote
Old Oct 24, 2006, 12:23 PM   #23
Senior Member
 
tchuanye's Avatar
 
Join Date: Feb 2003
Posts: 1,279
Default

tinosa wrote:
Quote:
Fantastic photography as usual Tchuanye !
What an elegant bird, obviously very light weight.
Thank you
ha ha....either light weight or strong reeds! Either way, it has very good sense of balance!

Thanks!


tchuanye is offline   Reply With Quote
Old Oct 24, 2006, 3:26 PM   #24
Senior Member
 
tcook's Avatar
 
Join Date: Dec 2004
Posts: 2,703
Default

Excellent shots, #2 -3 and the bird I really like.
tcook is offline   Reply With Quote
Old Oct 25, 2006, 10:41 AM   #25
Senior Member
 
tchuanye's Avatar
 
Join Date: Feb 2003
Posts: 1,279
Default

tcook wrote:
Quote:
Excellent shots, #2 -3 and the bird I really like.
Thanks!


tchuanye is offline   Reply With Quote
Old Oct 28, 2006, 6:37 AM   #26
Senior Member
 
callmebali's Avatar
 
Join Date: Mar 2005
Posts: 876
Default

The ant mimicking spider is a very interesting insect, you go further then avarage macro photography, you show us some nature study....
The quality of the other jumper pictures is awesome Spiderman!
I like the acrobat bird photos very much, too.
bali
callmebali is offline   Reply With Quote
Old Oct 28, 2006, 9:02 AM   #27
Senior Member
 
Beth Ellen's Avatar
 
Join Date: Jul 2006
Posts: 724
Default

It looks like your solution on the left is quite simple but for me I am never clear on what kind of materials to use. I know...experiment...but I am not a scientist type. ) What material do you recommend? Oh and is the omnibounce diffuser a universal fit? It is interesting that the materials/design of your second flash look just like my Phoenix. Someone must diffuse the materials into different brands. )

tchuanye wrote:
Quote:
D.Ann wrote:
Quote:
Wow I am impressed, you have "set the bar" pretty high with those pictures. When you say diffused flash, what do you mean...donna
Thanks donna!

Diffuse flash is like using the omnibounce diffuser.

Here are the pics of my flash...


Beth Ellen is offline   Reply With Quote
Old Oct 28, 2006, 9:05 AM   #28
Senior Member
 
tchuanye's Avatar
 
Join Date: Feb 2003
Posts: 1,279
Default

callmebali wrote:
Quote:
The ant mimicking spider is a very interesting insect, you go further then avarage macro photography, you show us some nature study....
The quality of the other jumper pictures is awesome Spiderman!
I like the acrobat bird photos very much, too.
bali
Thanks for the encouragement bali!



tchuanye is offline   Reply With Quote
Old Oct 28, 2006, 9:11 AM   #29
Senior Member
 
tchuanye's Avatar
 
Join Date: Feb 2003
Posts: 1,279
Default

Beth Ellen wrote:
Quote:
It looks like your solution on the left is quite simple but for me I am never clear on what kind of materials to use. I know...experiment...but I am not a scientist type. ) What material do you recommend? Oh and is the omnibounce diffuser a universal fit? It is interesting that the materials/design of your second flash look just like my Phoenix. Someone must diffuse the materials into different brands. )
Yes the flash I have could be the Phoenix....its just called the Embolitz here....comes with a plastic flash bracket.

The omni is not a universal fit. I bought it for the FL-28 panasonic flash, and it died on me. So I used it for the new flash. Its not a fit at all, hence I taped it end to end to my flash.

The simplest way to diffuse the flash is to use a bounce card.....just any old straight white cardboard strap to the flash will do. I used it long time ago.

If you have those milk bottle semi-white or translucent plastic bottles, you can cut it up and use it as a diffuser too, OR, tape it over the ends of the camera lens, and point the flash directly at it...the plastic will diffuse the light.

The one I am using (on the left) are some plastic type of corrugated sheet.....pp tend to buy them for art and craft. Hard to describe it, but any white translucent plactic sheet will fit the bill.



tchuanye is offline   Reply With Quote
Old Oct 28, 2006, 9:22 AM   #30
Senior Member
 
Beth Ellen's Avatar
 
Join Date: Jul 2006
Posts: 724
Default

Thanks for the pointers. I am going to get started on this. I really need to improve my lighting. )
Beth Ellen is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 6:46 AM.