Now that is a circular aperture, which makes very nice round bokeh even when stopped down a bit, and also makes many-pointed sunstars from highlights in the frame.

I don't use this lens often, as it requires two adapters, is big and heavy, and has a fully manual aperture (with pre-selection ring to create a mechanical stop at the selected "f-stop", so you can focus fully open) and heavy but smooth manual focus.

Bonus points if you know which make and model this is.

#aperture #photography #diaphragm #lens

#Evolutionary #biology question:

Do #animals other than humans clear their #throats rather than #cough , or is that one of the things that comes with vocal-language-level #diaphragm control?

#askFedi

Breathing Techniques for Maximizing Strength 😮‍💨💪

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👉 Valsalva Maneuver for Heavy Lifts

👉 Diaphragmatic Breathing for Better Control

👉 Breathing Timing During Lifts

👉 Breathing Pauses for Strength Endurance

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#breathing #strength #weightlifting #strengthtraining #valsavamaneuver #diaphragm #lifting #strengthendurance #personaltrainer #onlinecoach #onlinefitnesscoach

If you have been to a yoga class you probably have heard the cue of "breath with your belly", "expand your belly to activate your diaphragm for deeper breathing" or some similar wording. This is not how you "belly breath", you do not want to learn to press out your belly when breathing, its not a good practice.

When you inhale fully your belly should actually go inn. Because the core muscles (transversus abdominis in particular) need to work to expand your chest. By keeping the core tight, almost like a mild brace in preparation for a punch, it allows for the diaphragm muscle to expand downward and to the sides and thus give more room for the lunges to fill with air. Your rib cage should expand out to the side and to the back. Anatomically your lungs has most expansion potential outward to the side and toward the back, allowing for optimal air intake. The way you breath should reflect that. By expanding your belly you will loose core tension making it difficult to perform any tasks or exercise while also taking deeper breaths.

You want to keep tension, core activated on both inhale and exhale, learn to do it right 😀
Important to note, this is not a technique, this is how we are designed to breath.

#Breathing #Diaphragm #Bellybreathing
Have You Been Diaphragmatic Breathing WRONG?! (do this instead)

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