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Here are some examples of flash, on wide lens.
The equipment used for this test is an Olympus E-3 w/ Samyang 8mm Fisheye and FL-36R flash, mounted on cameras’hot shoe.

1. Shot without flash.

2. Shot with camera’s built in flash. You can see the shadow.

3. Shot with external flash. If it was a normal lens, image will be ok, but at 8mm it isn’t.

4. Shot with external flash, positioned a bit lowered. Better, but still not ok.

5. Shot with external flash and diffuser. Better.

6. Shot with external flash and diffucser. Also positioned lowered. Better than before.

7. Shot with external flash, heading at the ceiling (bounch). Much better!

8. Shot with external flash, heading at the ceiling (bounch) with diffuser. Much much better!

A video test of Nikon D90.
Lens: Tokina 11-16
Always with AE-L on, except on the middle when I unlocked and re-locked again.

In general video looks good but the compression is causing artifacts.
No PP, Neutral picture options on D90.
Maybe a more contrasty and sharpened option would be better.

Olympus E-410 with OM G.Zuiko 28mm f/3.5

Olympus E-3 with OM G.Zuiko 28mm f/3.5

Olympus E-410 with M42 Helios 44mm f/2

Lenses and Focal Length:

100% Crops:

Santa gave me a new lens (and a camera) to play with…here is a quick test.

Notes:

Nikkor costs ~100Euro and Sigma ~370Euro.
Nikkor does not focus on small Nikons (D40,40x,60) but Sigma does.
Sigma is huge

All tests done with Nikon D90 , no sharpening on camera, jpeg (so you won’t see any CAs) large, no PP.

All crops are 100%.

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