Kenneth Almquist

If you build a two element lens with a convex front element and a concave element in the middle, the focal length of the lens will be longer than the physical distance between the front element and...

Based on the studio test scene from the review of the D3400 I'd say that the noise in your photograph is about what you should expect from the camera.  (I know you have a D3500 rather than a D3400, ...

Any damage that occurs in seconds would be due to the salt water causing a short circuit.  The more typical salt water damage is due to corrosion.  Sea water is not salty enough to cause that much ...

I expect all native Z lenses will be focus by wire. With native Z lens, you get

1) A ring that can be assigned to one of several different functions, rather than a ring that can only be used to...

The 35mm focal length is the sweet spot for the 18-300mm f/3.5-6.3 lens.  Comparing the 18-300mm at 35mm to the DX 35mm lens: 1.  The 35mm lens has a larger aperture (f/1.8 vs. f/4.0) 2.  The ...

I will point out that Lightroom actually forces specific answers to a series of questions: 1)  Do you want geometric lens distortion corrected? A.  Yes    B. No Good, you chose A.  (If you chose B, ...

I think norjens called this correctly earlier in this thread:  The next H model will have all the features of the X-T4.  In fact they might even skip a couple of numbers and name it the X-H4 to ...

When I've been limited to one lens, I've generally taken the Nikon 18-300mm f/3.5-6.3.  Other commenters on this thread have suggested the 18-140mm zoom, but before purchasing the 18-300mm I ...

The lens situation limits the appeal of this camera even to professionals who can afford to buy a $10,000 camera. If you are trying to shoot in low light or want a shallow depth of field, the...

It sounds like a loose screw.  If you don't get it fixed, there's a good chance that the problem will recur, but the least expensive option is to wait and see what happens. If you are lucky, the ...

Nikon is having trouble producing enough Z7 cameras to keep them in stock even at the current price. My guess is that Nikon will eventually drop the Z7 price by $300 or so, and then come out with...

Thanks for the suggestion.  Yes, I'm using a DSLR, so there is both a mirror and a mechanical shutter.  I haven't noticed shutter shake using any other lenses, but I suppose that shutter shake is ...

Previously, the longest focal length lens I owned was the Nikon 18-300mm f/3.5-6.3, which I purchased after trying out a Sigma 18-300mm and discovering that the Nikon was sharper everywhere, but ...

Probably this is another side effect of the lens being permanently stopped down.  The camera is expecting the lens aperture to be smaller during the shot than it is when the light measurement is ...

“If you need more depth of field with macro subjects it's best to use a shorter focal length.”

Actually, with macro subjects a shorter focal length isn't going to give you enough extra focal...

You may want to take a look at the DxOMark comparision: https://www.dxomark.com/Lenses/Compare/Side-by-side/Sigma-18-300mm-F35-63-DC-MACRO-OS-HSM-C-Nikon-on-Nikon-D500-versus-Sigma-18-250mm-F35-63- ...