Backlighting and image artefacts

This is a part of a 4x5 Efke PL100 negative (f16, ½ sec) taken with a 90mm f4.5 Grandagon on a Sinar Norma fitted with a bag bellows (my scanner can only handle a little less than half of a 4x5 negative). It is exposed in strong backlighting – the sun was just outside the top left of the whole scene. I used a lens shade but a large part, if not the whole of the front element of the lens was in direct sunlight during the exposure. Now to my question:

Over the water and down over the grass on the right side of the image there is some sort of artefact that I have not encountered before. Is this caused by internal reflections within the camera, or is this caused by something else?

Cheers

Claes

It's internal reflections in the lens. Light bounces forwards off one surface, backwards again off another and onto the film. The heptagonal shape comes from the aperture.

This is so much a signature of what happens when the sun strikes the front element that Photoshop includes it as a filter effect so you can add it to photos that don't have it

Many thanks Struan.

Claes

One tip: a 105 mm Lee adapter ring fits the old Norma filter holder perfectly. I find the Lee hood a good compromise between a fixed hood and the ideal but fiddly solution of an extra bellows and auxiliary standard.

You could also use the standard lens shade (its called kompendium in danish) to keep the lens in the shade. there are also the special front with the barndoors.

I use the lens shade and I find it to be the easiest way to get rid of unwanted light.

Thanks for the advice. I have been contemplating the purchase of a Lee filter system for some time.

However, I doubt that any type of lens shade would have helped me when taking this image -given the short focal length of the lens and the angle of sun. To make things worse I could not wait for better light. Nor could I back up and use a longer lens.