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Laowa 25mm f/2.8 2.5-5X Ultra Macro vs 100mm f/2.8 2x lens
https://gilwizen.com/laowa-25mm-ultra-macro-lens-review/
https://www.cameralabs.com/laowa-25mm-f2-8-2-5-5x-ultra-macro-review/
- Pros:
– Lightweight, small size for a high-magnification macro lens
– Highest magnification lens available for non-Canon users
– Excellent sharpness and image quality
– Consistent working distance
– Narrow lens barrel makes it easy to find and track subject
– Affordable
- Cons:
– Manual, no auto aperture control
– No filter thread (but still customizable with caution)
– Dark viewfinder when closing aperture makes focusing difficult in poor light conditions
– Magnification range is short 2.5-5x compared to the competition
Combining a Laowa 25mm 2.5x lens with a Kenko 12mm extension tube
To find the combined magnification when using a Laowa 25mm 2.5x lens with a 12mm Kenko extension tube, given the magnification of the lens itself, the extension tube length, and the combined setup, you can calculate the total magnification.
First, consider the magnification of the lens itself, which is 2.5x.
Then, to find the total magnification when the extension tube is attached, you can use the formula:
Total Magnification = Magnification of the Lens + (Magnification of the Lens * Extension Tube Length / Focal Length of the Lens)
In this case, the extension tube length is 12mm, and the focal length of the lens is 25mm. Using the values:
Total Magnification with 2.5x = 2.5 + (2.5 * 12 / 25) = 2.5 + (30 / 25) = 2.5 + 1.2 = 3.7x
Total Magnification with 5x = 5 + (5 * 12 / 25) = 5 + (60 / 25) = 5 + 2.4 = 7.4x
- Pros:
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DNEG Canada is moving into unionizing
IATSE, which also runs the powerful Animation Guild Local 839 out of Los Angeles, says that organizing a union will give collective voice to workers’ concerns and requests. Some of the things it aims to achieve at DNEG Vancouver include:
- More transparency and consistency in the decisions that impact our daily lives
- Improvements to current working conditions (i.e. salary, vacation)
- Enhanced RRSP and health benefits
- Sustainability in the Canadian VFX industry as a whole
- Access to legal counsel
- Protections from sudden and unjust layoffs
- Strong representation and solidarity across the Canadian VFX industry
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Epic Games cuts around 16% work force, 830 jobs
https://www.epicgames.com/site/en-US/news/layoffs-at-epic
https://www.theverge.com/2023/9/28/23894266/epic-games-layoffs-fortnite-unreal-engine
Tim Sweeney sent the following email to Epic employees:
As we shared earlier, we are laying off around 16% of Epic employees. We’re divesting Bandcamp and spinning off most of SuperAwesome.
For a while now, we’ve been spending way more money than we earn, investing in the next evolution of Epic and growing Fortnite as a metaverse-inspired ecosystem for creators. I had long been optimistic that we could power through this transition without layoffs, but in retrospect I see that this was unrealistic.
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Photography basics: Solid Angle measures
http://www.calculator.org/property.aspx?name=solid+angle
A measure of how large the object appears to an observer looking from that point. Thus. A measure for objects in the sky. Useful to retuen the size of the sun and moon… and in perspective, how much of their contribution to lighting. Solid angle can be represented in ‘angular diameter’ as well.
http://en.wikipedia.org/wiki/Solid_angle
http://www.mathsisfun.com/geometry/steradian.html
A solid angle is expressed in a dimensionless unit called a steradian (symbol: sr). By default in terms of the total celestial sphere and before atmospheric’s scattering, the Sun and the Moon subtend fractional areas of 0.000546% (Sun) and 0.000531% (Moon).
http://en.wikipedia.org/wiki/Solid_angle#Sun_and_Moon
On earth the sun is likely closer to 0.00011 solid angle after athmospheric scattering. The sun as perceived from earth has a diameter of 0.53 degrees. This is about 0.000064 solid angle.
http://www.numericana.com/answer/angles.htm
The mean angular diameter of the full moon is 2q = 0.52° (it varies with time around that average, by about 0.009°). This translates into a solid angle of 0.0000647 sr, which means that the whole night sky covers a solid angle roughly one hundred thousand times greater than the full moon.
More info
http://lcogt.net/spacebook/using-angles-describe-positions-and-apparent-sizes-objects
http://amazing-space.stsci.edu/glossary/def.php.s=topic_astronomy
Angular Size
The apparent size of an object as seen by an observer; expressed in units of degrees (of arc), arc minutes, or arc seconds. The moon, as viewed from the Earth, has an angular diameter of one-half a degree.
The angle covered by the diameter of the full moon is about 31 arcmin or 1/2°, so astronomers would say the Moon’s angular diameter is 31 arcmin, or the Moon subtends an angle of 31 arcmin.
