The current lens only (Adorama | B&H | Amazon) and DSLR combo (Adorama |B&H | Amazon) rebates are set to expire on February 28th, 2015. I expect that they will be extended in March, but with Nikon you never know.
Venus Optics, a Chinese manufacturer, released a 60 mm f2.8 ultra macro-lens. It is a special lens, because it can achieve a magnification of 2:1 (comparison: The 105 mm f2.8 Micro Nikkor “only” achieves a ratio of 1:1).
If you are not familiar with these numbers: The reproduction ratio describes the size of the image on the sensor in relation to the real-life size of an object. At 1:1 a 10 mm object will produce a 10 mm image on the sensor. At 2:1 the image of the very same object will be 20 mm.
Diffraction - it’s a topic that is frequently floated throughout internet forums and camera clubs, especially among landscape and high resolution shooters. The problem is, those discussions can leave you more confused than a chameleon in a bowl of Skittles.
In this video, we’ll go over all the essentials you need to know about diffraction in photography and kick the myths to the curb. We’ll dive into just what diffraction is, what it looks like, and what causes it.
And, most importantly, we’ll look at how diffraction can impact your photography and what you can do about it.
The video uses example after example to tackle burning questions such as:
How far can you safely stop down?
Does diffraction limit the usefulness of high res sensors?
Can you sharpen out diffraction?
Should you ever use small F/stops?
What causes diffraction in the first place?
What's the difference between sharpness and depth of field?
So, if you’re ready to discover the truth about diffraction and its impact on your photography, go ahead and press that play button:
For this image, I only needed F/9.5 to pull it off. I had experimented with F/6.7 and then F/8, but the truth is those F/stops just weren’t getting me the foreground to background sharpness I needed. So, F/9.5 and a little hyperfocal distance saved the day. While my D810 is seeing slight diffraction at F/9.5, it made little difference - and was essentially gone with just a very slight amount of sharpening. I feel like I can print this about as large as I’d ever like. Captured with a D810, Nikon 28mm 1.8G, F/9.5.