Orchid using Macro Helicon Focus Software

For a Photography Homework set by @RM1L

The aim was to get the cup in focus and blurr the background (you know, narrow depth of field they say), I guess I got it pretty right :)

On the farm.

Macro 1

Oncidium, abbreviated as Onc. in the horticultural trade,[2] is a genus that contains about 330 species of orchids from the subtribe Oncidiinae of the orchid family (Orchidaceae)

Halina 35X under repair (sticky shutter and stiff grease on focussing helicoid).

Zenit B with Helios 44-2 lens on Lucky SHD100 stand developed in Rodinal 1:100 dilution for 75 minutes.

Memorial day 2014

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Shutter Speed: fast

Movement: frozen

Aperture: large

Depth of Field: narrow

Light

Quantity: medium

Quality: soft

Direction: back

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Macaw

Yeah, still doing lame depth of field experiments...

At Home Sweet Home

Taken for our daily challenge .. starts with D

I think this pine cone (which is huge) came from California, but i could be wrong.

using the macro but focusing on the background

Depth of Field

Ant on a flower Macro shot

There is a lot of confusion about circles of confusion...predictable I suppose ! This table uses the equation from the focal encyclopedia. It shows, as a simple example, that the DOF of a 50mm lens on a 1/2 frame camera at f/1.4 is the same as that of a 100mm lens on a full frame camera at f/2.8, when both are focussed at a distance of 10metres, and for the same coc as a percentage of the frame - ie 0.2% or 1/500th. The table calculates the near and far distances around the focal distance where we reach this coc, the difference is the DOF. I use the % of the frame, since when we print our pictures out the same size, with in this example the same view, then it is that that matters, not the actual mm of the coc.

I didnt mention, but a 50mm lens on 1/2 frame gives the same field of view as 100mm on full frame.

Hopefully it will also be apparent from this that since the physical coc is larger on a larger format camera, then for the same resulting image sharpness the lens does not have to be so good - the molded plastic lens in the compact cameras are startlingly good when you consider the small sensor size, not to mention the zoom ratios achieved. CAD and CADCAM for you!

For the non-beleivers, have uploaded some test shots. Sorry for no exif on the 4/3rds shots, this is because I used a canon FD manual 50mm f/1.4 lens...bit out of my budget for a electronic one.

Colourful Grain Seeds

Depth Of Field