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How should I resolve my birding GAS?

Started 5 months ago | Polls thread
Kharan
Kharan Senior Member • Posts: 2,487
Re: How should I resolve my birding GAS?
1

User1303423862 wrote:

The acid test will be at 300mm + 2X TC downsampled to compare with 300mm cropped to half resolution to get the equivalent FOV. That's what this is really about.

Whilst you're here, and hopefully looking at a bigger screen this time, please have a look at Larry's TC on the 55-250 IS lens and tell me where in the image I need to be looking for the "serious degradation in image quality" you talked about last time.

That photo looks OK, but you can do better with bare optics. I know my RF 100-400mm performs better than that. Even with a 1.4x TC I’d expect it to deliver better results, although I haven’t tried that. This shot reminds me of a Canon FDn 400mm f/4.5 I used to own years ago - decent, but ultimately unimpressive and not worth the effort. It probably makes for a killer sports lens on a shoestring budget, but it’s insufficient for wildlife.

I’m abroad right now, so unable to access my photo database, but once I return I could fish out some samples to compare with yours.

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"Chase the light around the world
I want to look at life
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