Many a telescope owner, after gazing at the sky for a while, wants more; wants to share what she or he is seeing. There are several ways to achieve this. The most obvious is shooting through the telescope eyepiece with a small camera or cell phone.… more »

The Nikon F-Mount was launched with the Nikon F camera in 1959 and has remained virtually unchanged since, making it the only lens mount still in production over 5 decades after its introduction. The camera mount comes essentially in 3 flavors: F, AI-S and AF, with some minor adaptations for particular cameras, mostly the digital entry-level models, which feature 2 extra screws and the minimum aperture confirmation notch, discussed later on. more »

It's been already more than five years since I wrote this article (in Spanish) on autofocus and although in many areas the innovation of DSLR’s has slowed down some, autofocus systems are still making unimagined jumps. In this article we review the 51-point system, which was introduced in late 2007 in the Nikon D3, D300 and the evolved version of which is used in the D7100, D810 and D4S (Advanced Multi-CAM 3500). more »

On November 25 last, Tamron announced the launch of the successor of its very respectable 200-500mm f/5-6.3 ultra tele-zoom, the Di SP 150-600mm F/5-6.3 VC USD, the first afficionado super tle at under $1500   On November 25 last, Tamron announced the launch of the succesor of it's very respectable 200-500mm f/5-6.3 ultra tele-zoom (test here), the Di SP 150-600mm F/5-6.3 VC USD. What does that letter-soup stand for, you wonder? Di means “Digi… more »

If you want to quickly assert if your lenses are focusing properly, my friend Carsten recommends the “Newspaper Test”. This works very well, he says, because we are so used to letters that we can judge “readability” much better than a certain degree of blur. It is also the method of choice to test longer lenses at different distances, because for that both the ruler and the domino test are a bit tricky; it may be quite difficult to judge the results at a focusing distance of – say – ten meters. If you want to quick assert more »

Even without counting new Coolpixes, lenses and accessories, Nikon's 2012 is one of – if not the – most proliferous year in its history. Sofar, the company has launched no less than 5 new DSLR cameras: the D4 in January, the D800/E in February, the D3200 in April, the D600 in September and the D5200 – in Europe, Asia and Australia, on November 5, last. more »

Untitled Document Nikon D4 Nikon D800 (E) Pentax 645D Sensor type CMOS CMOS CCD Anti Aliasing  (AA) filter Yes Yes / No (E version) No Sensor size 36x23.9 mm 35.9x24 mm 44x33 mm Res… more »