[marcusBMG]

I came across this, and thought the test pics were really quite surprising. Better, for example, than an average 500mm mirror lens.

Build a Super Telephoto Lenses w/o Using a Camera Lens: DIY and Photo Experiments Forum: Digital Photography Review

[Aaron28]

birding at marbutt bend trail, athens, alabama......K-3ii....sigma 150-500os

[blankmampf]

I came across this, and thought the test pics were really quite surprising. Better, for example, than an average 500mm mirror lens.

Build a Super Telephoto Lenses w/o Using a Camera Lens: DIY and Photo Experiments Forum: Digital Photography Review

Like Lego for lenses
Also, that "Astro Berlin Fernbildlinse 800mm f/5" in the post....you'll need an assistant, and a telegraph line to tell them when to move the focus ring

---------- Post added 05-25-21 at 07:21 PM ----------

birding at marbutt bend trail, athens, alabama......K-3ii....sigma 150-500os

Nowadays every bird has its own little throne....
Beautiful scintillating colours on that black bird (yellow-beaked crow?), and got the shot off just the right moment to capture the regal pose of the one with red wing tips

[Aaron28]

Nowadays every bird has its own little throne....
Beautiful scintillating colours on that black bird (yellow-beaked crow?)

ha! yeh they all got a perch/throne!!! the last is a european starling in it's mating colors i believe.....the third with the red is a red wing black bird

[HoutHans]

I came across this, and thought the test pics were really quite surprising. Better, for example, than an average 500mm mirror lens.

Build a Super Telephoto Lenses w/o Using a Camera Lens: DIY and Photo Experiments Forum: Digital Photography Review

Thanks for sharing this, seems like a fun project to engage with.

[WPRESTO]

Also, that "Astro Berlin Fernbildlinse 800mm f/5" in the post....you'll need an assistant, and a telegraph line to tell them when to move the focus ring

Way back in the film era one of the magazines posted a series of images of crashing waves and perhaps some surfers that were taken in California by someone using a 800mm Astro Berlin. I think each one came with a WWII surplus gun carriage in lieu of a tripod. Today you could get the same focal length and much better IQ with a refracting telescope intended for astronomy, the best of which have apochromatic objectives, commonly a cemented triplet.

[blankmampf]

Tried my new Tamron 65B yesterday in a park, and I'm really blown away by the image quality even with the 1.4x TC.
I arrived at a fortunate time, there were lots of geese enjoying the afternoon sun before going for a swim.


My keeper rate was surprisingly high for a manual focus lens.




Catching a bird mid-flight still will require more practise, and a tripod, if possible this one was circling over the pond, probably searching for fish, and came down to dive into the water twice while I was watching, sadly I haven't managed to pre-focus onto the right spot at the right time.

And I'm very happy with the hand-holdability of the lens. Sure, it's huge and heavy (2kg and a bit over 30cm for the lens alone, add to that the camera body), but I can hold the forward portion and operate the focus ring at the same time with my left hand while keeping the body and trigger in my right. It's tiring my hands and arms after a few minutes, but that should get better with practise as well. If I get my 3D printer running again, I could print a Tamron-style palm rest for the 1/4 screw mount.
Getting a "proper" Adaptall 2 adapter with aperture stop-down control would also be nice in the future, but using a cheap one without also wasn't all that bad.

One thing I still need to get over is the general social anxiety when handling such a monster in public good thing I'm not doing any street photography.

[skolkmeier]

Cooper’s hawk flew into neighbors tree. Developed in camera.

[Aaron28]

couple more from marbutt's bend.....K-3ii...sigma 150-500os

[DonV]

Blue Heron head shot.
KP with 50-500 Sigma, crop.

[riseform]

More fun (for me) with the K3iii and DA 560 last weekend and two Godox triggered remote flashes, slow shutter, high f/stop shots, trying to balance background exposure and flash. Not a K3iii review as I could have done this with any camera.


the resulting Grosbeak ghosts....
Evening grosbeak


Black-headed grosbeak

[Ducatigaz]

Here are a few shots taken with my K-3iii in 1.3 crop mode. K-3iii/FA*600mm F4 ED[IF]/RRS BH-55/Kirk window mount.













K-3ii/Sigma 800mm F5.6 APO EX/RRS BH-55/Kirk window mount.

[Mbaez]

Here are a few shots taken with my K-3iii in 1.3 crop mode. K-3iii/FA*600mm F4 ED[IF]/RRS BH-55/Kirk window mount.













K-3ii/Sigma 800mm F5.6 APO EX/RRS BH-55/Kirk window mount.

Wow, phenomenal pictures as always!
PS. I think that I see a difference in sharpness and color with your new K3iii.

[cmohr]

Here are a few shots taken with my K-3iii in 1.3 crop mode. K-3iii/FA*600mm F4 ED[IF]/RRS BH-55/Kirk window mount.













K-3ii/Sigma 800mm F5.6 APO EX/RRS BH-55/Kirk window mount.

Nice work, the detail is excellent.

I have only used the Sigma 500/4.5 on my K-3iii so far, hope to get out this weekend again and swap to the FA*600/f4 and see how it goes.

[Canada_Rockies]

Here are a few shots taken with my K-3iii in 1.3 crop mode. K-3iii/FA*600mm F4 ED[IF]/RRS BH-55/Kirk window mount.

K-3ii/Sigma 800mm F5.6 APO EX/RRS BH-55/Kirk window mount.
on Flickr

Another great set of images, Gary!