For Sony A-mount full-frame (Minolta/Sony Alpha DSLR era) manual-focus zooms, the honest situation is a bit unusual: 👉 There are almost no native “manual-focus-only” full-frame zooms in A-mount. Most A-mount…
18/6/2026: I started this 24 hours ago and the power bank still shows 4 bars of power – so I have shown that this setup will provide plenty of power…
Hi Francesco & Jason, I am currently outside with the dawn chorus (bird song at dawn), as the Milky Way is (sort of) overhead at this time of the day.…
From the book “Field Maxima Inside Habitable Structures Exposed to 2.45 GHz Plane Wave Radiation”:
The three stalks that hold the feed assembly in front of a radio dish are usually called feed support struts or feed support legs. Other terms you may encounter are:…
Much work has been done on optimising feeds to illuminate a dish as efficiently as possible reducing spill over which on receive means the feed sees ground raising the system…
From Eduard Mol 17/6/2026: Keep in mind masers are variable, so any list will be more of an indication. W49 is the best one to start out with, because it’s…
This is built around an 140cm ex-communications radio dish which used to adorn the side of an university physics department. It is paired with a Discovery Hydrogen Line feed and…
Keep in mind masers are variable, so any list will be more of an indication. W49 is the best one to start out with, because it’s consistently very bright and…
Hello Andrew Sorry for the slow reply … lots going on here. Much work has been done on optimising feeds to illuminate a dish as efficiently as possible reducing spill…
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