Experiments on Nikon D600 Exposure

UPDATE:  I posted about this on DPReview, got some helpful responses suggesting that there are issues with my shooting method.  That DPReview thread is here if you want to check it out.  I have done follow up experiments that are inconclusive as to the advice given in that thread.  The D600 still appears to overexpose.  I will do a followup post about it.

UPDATE 2: 2nd set of experiments here

I've shot with a number of cameras and they all tend to have different exposure tendencies. For example the Pentax K100D and Fuji S5 attempt to avoid blowing highlights, often producing straight-out-of-the-camera (SOOC) images that appear underexposed.  The Nikon D80 doesn't seem to be very concerned with highlights and produces SOOC images where the subject is correctly exposed but the image often has blown highlights such as in the background. Then there are cameras such as the Nikon D70 and Nikon D3 which in my opinion have a balanced exposure (taking into account the limits of the sensor's dynamic range).

In this post, I took some test shots with the D600 to evaluate whether the D600 has a tendency to overexpose or underexpose. All shots were taken in raw and processed in View NX2.

Filters for Protecting Lenses: High-End vs. Budget vs. Dirt-Cheap

With digital photography, using filters to achieve special effects has become much less common, with the exception of neutral density filters, graduated ND filters, and circular polarizers.  The other exception, with some controversy, is the use of filters to protect lenses.  Typically, UV filters or sometimes skylight (warming) filters are used for this purpose.

In this post, we compare images from lenses without any filter, with a budget filter, and a high-end filter.  The filters I tested were:
(a) a high-end filter, the Hoya HD Hardened Glass 8-layer Multi-Coated Digital UV Filter, around $70 for 77mm.
(b) a budget filter, the Hoya skylight filter (standard version, not multi-coated), around $20 for 77mm.  Note: the skylight filter has a warming effect, so for purposes of this comparison, please take that into account as part of the filter design and not an inherent characteristic of budget filters.
I've also included a separate test for an ultra-cheap generic UV filter.

I tested the filters on two lenses:
(i) a flare-resistant lens, the Nikkor 24-70 2.8G on a Nikon D3; and
(ii) a lens that is [supposedly] susceptible to flare and ghosting, the Tokina 11-16 2.8 on a Fuji S5 Pro.
Both lenses use 77mm filters so I was able to use the same set of filters for the tests.

Hit the jump for the samples.