douglas_herr2

Yellow-billed Magpie, Sacramento County California http://www.wildlightphoto.com/birds/corvidae/pica/ybmagp05.jpg

http://www.wildlightphoto.com/birds/accipitridae/buteo/rthawk20.jpg

http://www.wildlightphoto.com/birds/trochilidae/selasphorus/cahumm07.jpg

http://www.wildlightphoto.com/birds/accipitridae/haliaeetus/baeagl06.jpg Bald Eagle, Sacramento County California

http://www.wildlightphoto.com/birds/fringillidae/spinus/legold21.jpg

http://www.wildlightphoto.com/temp/DSC00384_fb.jpg

<p><img src="http://www.wildlightphoto.com/birds/emberizidae/melozone/catowh08.jpg" alt="" /></p> <p><img src="http://www.wildlightphoto.com/birds/parulidae/setophaga/yrwarb19.jpg" alt="" /></p>

<p><img src="http://www.wildlightphoto.com/birds/trochilidae/calypte/cohumm02.jpg" alt="" /></p>

<p>male Bushtit<br> <img src="http://www.wildlightphoto.com/birds/aegithalidae/psaltriparus/bushti08.jpg" alt="" /></p>

<p>Wilson's Warbler, Solano County California<br> <img src="http://www.wildlightphoto.com/birds/parulidae/cardellina/wiwarb03.jpg" alt="" /></p>

<p><img src="http://www.wildlightphoto.com/birds/corvidae/gymnorhinus/pijay01.jpg" alt="" /></p>

<p>Burrowing Owl fledgelings, Yolo County California<br> <img src="http://www.wildlightphoto.com/birds/strigidae/athene/buowl05.jpg" alt="" /></p>

<center> <p>female Black-backed Woodpecker, Sierra County California </p> <img src="http://www.wildlightphoto.com/birds/picidae/picoides/bbwood05.jpg" alt="" /></center>

<p><img src="http://www.wildlightphoto.com/birds/scolopacidae/gallinago/wisnip05.jpg" alt="" /><br> Wilson's Snipe singing.</p>

<p>Calliope Hummingbird in the Sierra Nevada</p> <center> <p><img src="http://www.wildlightphoto.com/birds/trochilidae/selasphorus/cahumm00.jpg" alt="" /><br> Sony a7II, Canon FD 500mm f/4.5 L</p> </center>

<p>Calliope Hummingbird, El Dorado County California<br> <img src="http://www.wildlightphoto.com/birds/trochilidae/selasphorus/cahumm00.jpg" alt="" /></p>

<p>My lightweight / backpacking kit is a 55mm macro lens (non-FD) and 300mm f/4 L (on a7II). If I want to trim a few more ounces I'll swap the non-FD 55mm macro for the FD 50mm macro to share adapter and extension tube with the 300. I wouldn't carry an f/1.2 lens while backpacking. The FD 50mm macro is quite inexpensive.</p>

<p>Marsh Sandpiper (extreme rarity in North America), 18 April 2016 Yolo County California<br> <img src="http://www.wildlightphoto.com/birds/scolopacidae/tringa/masand00.jpg" alt="" /></p>

<p> Sony a7II, Canon FD 300mm f/4 L</p> <p align="center"><img src="http://www.wildlightphoto.com/land/sacramento/_DSC9333.jpg" alt="" /></p> <p align="center"><img src="http://www.wildlightphoto.com/land/yolo/_DSC9463.jpg" alt="" /></p>

<p><img src="http://www.wildlightphoto.com/land/yolo/_DSC9463.jpg" alt="" /></p>

<p align="center"><img src="http://www.wildlightphoto.com/birds/trochilidae/calypte/anhumm40.jpg" alt="" width="600" height="480" /><br> female Anna's Hummingbird<br> Leica SL, Leica 280mm f/4 APO-Telyt-R</p>

<p>female Anna's Hummingbird (Sony a7II, Leica 280mm f/4 APO-Telyt-R)<img src="http://www.wildlightphoto.com/birds/trochilidae/calypte/anhumm38.jpg" alt="" /></p> <p>female Anna's Hummingbird (Leica SL, Leica 280mm f/4 APO-Telyt-R)<br> <img src="http://www.wildlightphoto.com/birds/trochilidae/calypte/anhumm40.jpg" alt="" /></p> <p> </p>

<p>OK, thanks for all the responses. I bought a New FD 500mm f/4.5 L and have adapted it to my camera (no infinity focus) and it looks good so far:</p> <center> <p><img src="http://www.wildlightphoto.com/birds/phasianidae/phasianus/rnphea03.jpg" alt="" width="429" height="600" /></p> <p><img src="http://www.wildlightphoto.com/birds/corvidae/aphelocoma/wsjay07.jpg" alt="" width="600" height="480" /></p> <p><img src="http://www.wildlightphoto.com/birds/turdidae/sialia/weblue23.jpg" alt="" width="600" height="400" /></p> </center>

<p>What's the difference between an FD 500mm f/4.5 L and a new FD 500mm f4.5 L? Are there any color fringes in high-contrast, out-of-focus areas?</p>

<p>Northern River Otter, Sacramento County California:</p> <p><em><strong><img src="http://www.wildlightphoto.com/mammals/mustelidae/nrotte15.jpg" alt="" width="600" height="400" /></strong></em></p>