I keep on working with photographs from my archives to convert them to b&w. To those new to my b&w posts I add a little bit of warmth to the images to simulate my favorite b&w printing paper, Agfa fiber base.
Notice that those images with great contrast between bright and dark areas lend themselves to better conversions. If not familiar with b&w filters they change their complimentary colors and with digital it is as easy as experimenting. There are excellent softwares to edit conversions and Topaz along with Nik make excellent softwares.

Photoshop and, I figure Photoshop Elements have channels and conversions found in Image>Adjust>Black and White to use filters or presets so we have plenty of sofwares out there to make conversions. I also use Affinity Photo which works pretty similar to Photoshop
Enjoy.

I have this 18-140 zoom lens that I usually just keep on the D90 Infrared camera body. That is a DX or APS-C setup regarding sensor size, i.e. "DX" in Nikon terms being smaller than the "FX" or full-size sensor in my D700.

I got to wondering what would happen if I attached my 1.4X TC (teleconverter) to the lens and used it on my D700. I already knew the DX lens wouldn't fill the entire FX frame. So why do it? That lens is the only one I have that has image stabilization and I thought it might be okay for a small distant subject where I'd crop down and only use the center pixels of the frame anyway. Surprise, surprise! It not only filled the FX frame on the D700, but did so at full zoom on the 140 mm end of its range where that arrangement would usually yield the smallest image circle. Depending on the particular lens, the wide-angle end of the zoom range can fill or almost fill the FX frame with this kind of setup.

No, I don't recommend this as sound practice to follow. I was just surprised and wanted to pass it along. I would suspect that the "unexpectedly filled" edges are probably not as sharp as a "correct" lens would produce, etc., but that's beside the point.

The attached full-frame photo from the D700/TC/DX lens combo (max zoom & not cropped) was just a quick hand-held test shot above the roofs of some houses at the end of the street. I used Photoshop to remove part of a transformer near the bottom left side of the photo and a cluster of wires leading to it. I also removed a couple of overhead wires that went from the lower left side of the photo toward the red-colored tree on the right, plus the top of a vent or chimney that was at the bottom center of the photo. For illustrative purposes I didn't want to crop the photo but didn't like that kind of junk in a scenic view either. There was a little bit of vignetting at the corners, but no more than some lenses normally do. View the download for a closer look (full frame but reduced in size for web and e-Mail -- it displays approx. 12" x 8" on my monitor).

Beautiful and very different examples of refraction, Linda! I love the first still life image, and the second is lovely in form and color! I looked everywhere for one of my droplet pics but couldn't find it, so the crystal ball in the swamp will have to do. For those not familiar with the crystal ball (or photo ball), the image in the ball is upside down. I chose to change mine by making a selection of the ball and then giving it a vertical flip.