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Old Jul 30, 2006, 10:51 AM   #1
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Hi all, FZ30 newbie here. Just got this camera and am very pleased with it. Finding my way around it. Can I ask my first question (sorry if this has been asked a number of times before but I can't seem to fing it anywhere).

Can any of you good people tell me the actual ratio in the macro mode (e.g. 1:1 etc). The manual only has min focusing distances and I can't find this info using search here or generally on the net.

TIA, Dave B.
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Old Aug 2, 2006, 4:18 AM   #2
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Hi again folks,

I still can't find the Macro ratio anywhere on the net (even on the Panasonic site) so I'm about to do my own test. Quite happy to post ther results back here for anyone who's interested.

Macro is usually defined as 1:1 or greater however the term is used loosely by some manufacturers (especially at the point &end of the market)to describe a shooting mode for close-ups rather than true macro. I need to know if I'm getting true macro 1:1 or greater.

I suppose the only way to test this is to draw a square on a piece of white card at a fraction under the sensor dimensions, set the camera to the max image capture size (i.e. 3264x2488 pix), shoot a frame in macro setting and see if the resulting image comprises the square + a minimal white border around it. Any other suggestions gratefully received.

TIA, Dave B.

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Old Aug 2, 2006, 8:11 AM   #3
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Dear Dave

yes 1:1 macro means that (independently from the final size of the image on print or on screen) you are capturing a frame as large as the sensor is.

If e.g. FZ30 CCD is 1,4cm wide, your macro photo should fill the LCD with a 1,4 x 1 cm area.

This is impossible with FZ30 or FZ20 only.

I have a FZ20which hasa 1cm (and few mm) wide CCD.
Best macro capability is achieved by setting the zoom at 2,5x (FZ20 at Wide angle is 6mm=36mm, thus 2,5x zoom means 15mm or 90mm equiv.)and approaching the lens at about 2cm from the object.
Doing so you capture 3,6cm wide.
To achieve 1:1 you must use a +3 diopter like Nikon 6T or 4T.
With this you can focus from a distance of 25cm, using all the 12x zoom and capturing about few more than 1:1.

Note that Enlargement/Magnification is also = diopters * Focal distance in meters:
Therefore (FZ20) 0,432 * 2,9 (Nikon 6T diopter is +2,9) = 1,2 (1,2 : 1).

With Nikon 6T + Nikon 5T you reach 1,9 : 1.

With Raynox DCR-250 (or two Nikon 6T and a 5T) which are more than +7, at 12x you achieve more than 3:1.

With a 50mm reversed lens (=+20 diopter) you get 8,64 : 1.

Also note that Magnification = lens Focal distance / reversed lens focal:
thus 432/50 = 8,64 x

Diopter = 1000/FD, thus a 50mm reversed lens is +20 diopter, a 24mm rev. lens is +41 (Impossible to focus/use handheld).

Finally note that because "magnific." depends on the sensor size, it is unimportant that you are shooting at 8 or at 5Mpixels.

Obviously if you want to know actual (real) magnification (SCALE)you must divide the reaL size of the photographed object by the linear size of your offprint or of your monitor.
Thus a 1mm ant head taken at 12x with a reversed 50mm (+20) at only 5Megapixels (2560 pixels wide) will measure about 1m, thus you are seeing it 1000 times as big...


For more infos on diopters, magnifications/frame/visible field sizeand focussing distance see Sven's (Seemolf) amazing pages (FZ5 photos) and useful tables: http://www.geocities.com/seemolf/
(in the Achromats section: http://www.geocities.com/seemolf/ach...achromats.html )

http://www.stevesforums.com/forums/v...mp;forum_id=15


For my own macros (13 pages gallery):
Narmer on MAcrophotographysite






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Old Aug 2, 2006, 3:47 PM   #4
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Hi Dave

I wondered exactly the same thing about my FZ30. I found an excellent article which you might like to check out

http://vapour-trail.blogspot.com/200...sonic-dmc.html

I think it answers all your questions and if not, provides interesting reading anyway

Best Wishes

Tony
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Old Aug 3, 2006, 6:18 AM   #5
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Francesco,

Thanks for all your useful information. A great help. I will inwardly digest. Appreciated very much

BTW, had a look at your macro images and I must say that you have some wonderful work there.

Tony,

Thanks for the link, perfect. It describes just what I was about to do myself.

IIRC aren't you the chap who started the Panasonic forum here on Steve's site (or perhaps the moderator?). Anyway, just like to say what a help the forum has been in my choosing an FZ30. I run a DSLR as well but need a high spec & capable all-in-one camera as a ‘take everywhere, sling in you backpack' camera for candid & street photography etc. It's the good level of info shared by users here on the forum and the superb quality of the FZ30 images posted here which made me decide on this camera.

Thanks all, keep snapping, Dave B.
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Old Aug 3, 2006, 10:48 AM   #6
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Hi Dave
Glad the link was of some use! I thought so. I have read some very interesting stuff on many of the forums on here - the latest in this one, well a link from it, about attaching a Canon FD 50mm lens backwards on to the front of an FZ! I have a range of FD fit lenses, including the aforementioned 50mm, a 24mm and a specialist 20mm designed for macro so I am going to have a play later on and see what I can achieve!

I cannot lay claim to starting the Panasonic forum as a whole, neither am I a moderator in any way shape or form, but I can say I started a bit of it: "Who needs a DSLR when the FZ30 is this good?"

http://www.stevesforums.com/forums/v...mp;forum_id=23

is the link, if you are interested.

Have fun,

Tony
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