James Markus wrote:
Ricardo, I have to admit that all the foot prints near the edge of the pool made me very nervous, but Italy's pools may be different than Yellowstone's.
The phenomenon of bubbling pools is a classic example of secondary volcanism, associated with the ascent of gases towards the surface and interaction with surface water. In the specific case of Caldara di Manziana, gases generally rise from depths of thousands of metres (> 2,000 m), and consist of 98-99 % carbon dioxide, and hydrogen sulphide, methane and minor components. Carbon dioxide has its origin in the carbonate rocks at the depths indicated above, which undergo decarbonation reactions when subjected to high temperatures (>200 °C). Hydrogen sulphide has a similar origin, most probably associated with the reduction of sulphatic rocks in the presence of carbon dioxide. When hydrogen sulphide reaches the surface, it oxidises, releasing H+ ions, sulfur and sulfur oxides, which are responsible for the typical odour. The pools of Caldara di Manziana are much less dangerous than Yellowstone's. The water is cold.
I finally got him. There are a couple squirrels that run up as close as they can to me on a roof perpendicular to my office desk. I interpret the look they give me as "are you watching" - then they leap from the roof to a dead branch in a cluster of dead branches that I zip tied to an old dinner bell that holds all the feeders. I had to pre-focus and leave the 55mm f1.2 & tc16a in manual mode. I've tried AF - and the camera gets fooled every time, because , like cats, the squirrels body & fur is in constant motion. Hope animated gifs work here
James Markus wrote:
I finally got him. There are a couple squirrels that run up as close as they can to me on a roof perpendicular to my office desk. I interpret the look they give me as "are you watching" - then they leap from the roof to a dead branch in a cluster of dead branches that I zip tied to an old dinner bell that holds all the feeders. I had to pre-focus and leave the 55mm f1.2 & tc16a in manual mode. I've tried AF - and the camera gets fooled every time, because , like cats, the squirrels body & fur is in constant motion. Hope animated gifs work here...Show more →
I like squirrels, but, they can cause havoc on buildings, at least barns.
I have a feeling my recovery time is going to be used for photos I took in New Mexico in February of this year. I still haven't touched them
pbraymond wrote:
I've enjoyed this fall shooting period (even if it seemed like it was shorter than usual). Looking to share shots that I like before fall is too far gone and the images perhaps seem more out of place. These next two images with the 105mm f2.8 AIS.
Ripolini wrote:
The phenomenon of bubbling pools is a classic example of secondary volcanism, associated with the ascent of gases towards the surface and interaction with surface water. In the specific case of Caldara di Manziana, gases generally rise from depths of thousands of metres (> 2,000 m), and consist of 98-99 % carbon dioxide, and hydrogen sulphide, methane and minor components. Carbon dioxide has its origin in the carbonate rocks at the depths indicated above, which undergo decarbonation reactions when subjected to high temperatures (>200 °C). Hydrogen sulphide has a similar origin, most probably associated with the reduction of sulphatic rocks in the presence of carbon dioxide. When hydrogen sulphide reaches the surface, it oxidises, releasing H+ ions, sulfur and sulfur oxides, which are responsible for the typical odour. The pools of Caldara di Manziana are much less dangerous than Yellowstone's. The water is cold....Show more →
Cold, that explains the lack of steam. Good to know it's at least safe temperature-wise for the people around the pool.
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James Markus wrote:
I finally got him. There are a couple squirrels that run up as close as they can to me on a roof perpendicular to my office desk. I interpret the look they give me as "are you watching" - then they leap from the roof to a dead branch in a cluster of dead branches that I zip tied to an old dinner bell that holds all the feeders. I had to pre-focus and leave the 55mm f1.2 & tc16a in manual mode. I've tried AF - and the camera gets fooled every time, because , like cats, the squirrels body & fur is in constant motion. Hope animated gifs work here...Show more →
Fun capture Jim!
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leighton w wrote:
Last evening's light was nice. 85mm f1.8 HC.
AdaptedLenses wrote:
I kinda miss the earlier morning light. 105mm f/2.8
But you got the boat nicely framed. How did you bribe the captain?
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James Markus wrote:
Couple more from the recent three year old's birthday party. I'm finding subtle differences between the 50mm f1.2 ais and the 55mm f1.2 ai'd Nikkor-S.C Wide open the older lens is a frog's hair sharper in the center of the frame. The older lens vignettes more, and the 50mm has smoother bokeh. I really love the scalloped focusing ring, but the grease is much too stiff. I looked at cleaning & lubricating it myself, but Richard's 200 page guide has completely intimidated me into accepting the status quo. Nikkor-S.C 55mm f1.2 ai'd & modified tc16a
Great shots, especially like the first one. With the camera teardowns and rebuilds I'm surprised to hear your hesitation on the lens.
Several from the Phoenix zoo 11/07/2024. Nikon 400 F5.6 EDIF AIS lens with and without TC-16A AF converter.. The lion male cubs are 5 months old.
Harry Palmer
