stanj wrote:
I'm heading to Norway for two weeks and even though I know what I want to take (lots, too much as always), I asked GPT and Perplexity. I'm not new to this (neither LLMs nor photography), but what went down - especially with GPT in this case - increased my blood pressure
I think the question about 17 TSE is a very scientific and pretty clear cut question that can be answered purely with math, which I suspect is why Gemini didn't completely trip over itself.
Yes I was surprised how good (and fast) Gemini was at math problems. This is why I found the defraction considerations of r7 (DLA F5.2) so insightlful. Beyond f5.2 you are introducing distortion, thus 200-800 at f9 vs 200-400/1.4x f5.6 becomes significant with the added effective magnification of such distortion (eg fstop matters for r7).
Dec 13, 2025 at 09:01 AM
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