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Topics - Gromit44

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Post Processing / Blending shots in Photoshop (CS6)
« on: 06/01/2013, 15:06:06 »
Can anyone think of a technique for blending these night exposures in Photoshop CS6?
 
I’ve got a range of tripod shots of an old 16th century building, with exposures going from -1.7ev to +1.7ev. Small sections of two of them are shown below.
 
The first (2994) is correctly exposed for the light bulbs but the building itself is underexposed. The second (2997) is correctly exposed for the building but the light bulb areas are completely blown out.
 
I’m trying to blend them together so that the building and the bulbs are both correctly exposed throughout. The problem is my Photoshop skills are limited and I can’t find a way of doing it without the edges of the layer mask becoming visible - i.e. if I apply it to the light bulb areas, it also darkens the walls behind (third pic below shows this effect - I’ve exaggerated it to illustrate the problem).
 
Does anyone have any bright ideas? (pun intended ☺). Maybe there’s a way of creating an ‘auto mask’ to replace just the areas that are over a certain level (i.e. the bulbs).

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Following on from this thread http://forums.hayobaan.nl/index.php/topic,20.0.html re the Nikon 14-24mm, I noticed that if I focus on the centre of the frame at 14mm, the centre is always sharp but the edges can be soft/distorted. If however I focus on the egde of frame, the centre is soft but the edge is sharp.

Here's an example showing the right edge of two different shots of the same subject. One is focussed at the centre, the other is focussed at the edge using Live View and the AF-ON button. The red square indicates the Live View focus point. (Nikon D800E, distortion control off, 14mm at f/9, mirror lock up, wireless remote).


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Photography & Gear / Wideangle lens - strange behaviour
« on: 08/12/2012, 17:04:09 »
I've got a Nikon 14-24mm f/2.8 lens. I did some long exposure architectural shots recently using a tripod, wireless remote and mirror lockup - some were at 16mm and some at 14mm.

All of the 16mm shots were sharp both in the centre and at the edges .  The 14mm shots were sharp in the centre but they were all extremely soft  and/or distorted at the left and right edges (not the top and bottom). Has anyone had a similar experience with this lens?   

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