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Messages - AlanF

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226
Animal Kingdom / Re: Show your Bird Portraits
« on: May 04, 2014, 03:30:19 PM »
Chaffinch's afternoon snack. 5DIII, 300mm f/2.8 II + 2xTC III, f/5.6 iso 640 1/1600. 100% crop.

227
Got mine 5 February.

228
Lenses / Re: Tamron 150-600mm AF servo issues?
« on: May 02, 2014, 03:46:02 AM »
Could you find out for sure if there is a firmware upgrade as it would be useful to know.

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Kingfisher diving and re-entry.

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Sony is making a bigger loss than expected, announced today, and it is rated at junk bond status.

http://www.bbc.co.uk/news/business-27234511


231
Third Party Manufacturers / Re: New Samyang Lenses Go On Sale Tomorrow
« on: April 28, 2014, 01:22:11 PM »
If I wanted a cheap and light 300mm I'd get a Canon Powershot that has wider aperture, AF, IS etc for the same price as the Samyang mirror. Or, if I wanted something to go on a mirrorless I'd get the 55-250 which again has a wider aperture, AF, IS etc and I bet outperforms the mirror. 

232
Lenses / Re: EF 400L f/5.6 vs. Tamron 150-600
« on: April 28, 2014, 07:40:48 AM »
I'm still in two minds on buying this lens, my Sigma provides good reach and mated to the 70D the IQ has improved 10 fold (compared to the 550D), but I'm blinded by the whole "big white ownership" scenario, will a 100-400L (plus a 1.4X TC) be considerably, and noticably better than my 150-500 or would this Tammy provide better IQ at 600mm without a TC???  For me the prime 400mm is not really an option due to it's limitations of range.
Ohh the drama of all the decisions!!! :o

 Both the Tammy and the 100-400 perform much better on full frame than crop.  You need sharper lenses on crop.  DxO has some very nice comparisons of the Tammy, Sigma and 100-400 showing that the Tammy is the clear winner on FF, but it is less clear on crop. The 100-400 isn't good with extenders. 

233
Lenses / Re: EF 400L f/5.6 vs. Tamron 150-600
« on: April 27, 2014, 06:28:52 PM »
Sorry to disagree with the above. But, the 70-200 with a 2xTC is neither sharp enough nor long enough for bird photography. Both the 400L and Tamron would blow it away (as would the 100-400L). The 70-200s f/2.8 and f/4 are both fabulous lenses that take a 1.4xTC well. But, longer than that, no, unless you are satisfied with soft bird photos that are not close ups.

234
Lenses / Re: EF 400L f/5.6 vs. Tamron 150-600
« on: April 27, 2014, 05:21:09 AM »
You see the differences in resolving power when you are looking at fine detail that is close to the limits of resolution of a lens. Here is a collage of shots of the centre of an iso 12233 chart (not a professional chart from a high quality printer but a standard laser print posted on the wall of my house in daylight). The results are pretty clear: at 400mm, the Tammy, which as as sharp as the 100-400 and close to the 400L, can't resolve fully the fine line circles; at 500mm it can; and 600mm it is definitely slightly better. For comparison, a 300mm f/2.8 II + 2xTC III wins at f/5.6.

I use the 300mm f/2.8 + 2xTC when I am out in the country or the Tammy when I need zoom or don't wish to be seen carrying the even more conspicuous 300mm in more urban situations or when travelling. For light weight and less conspicuousness, the 400/5.6 is great. But, the added length and IS and zoom of the Tammy are great assets and make it much more versatile.

235
Lenses / Re: EF 400L f/5.6 vs. Tamron 150-600
« on: April 27, 2014, 05:06:48 AM »
The uprezzing of 500 x 1.2 vs 600 done on TDP was misleading - he took images of a piece of bark that had so little detail that a 20% increase from 500-600mm would be expected to reveal little extra. Here are 3 more appropriate images, a greylag goose head central crop at f/8 with a 5DIII plus Tamron 150-600mm, f/8, at 400mm uprezzed 1.5x (top). 500mm x 1.2 (middle) and 600mm (bottom). There is a slight improvement on going from 400-600mm as there is not much fine detail but notice the improved bokeh. In the next posting I'll show where you see an improvement at the fine level.

236
Animal Kingdom / Re: Show your Bird Portraits
« on: April 22, 2014, 02:25:58 PM »
Very nice series 2n10.  Well done.
+1 Excellent series.

237
Animal Kingdom / Re: BIRD IN FLIGHT ONLY -- share your BIF photos here
« on: April 22, 2014, 02:17:53 PM »
I really like the Barn Swallow.  8)

+1, it's not easy to get those fast little blighters, and it was done very nicely.

238
Animal Kingdom / Re: Show your Bird Portraits
« on: April 22, 2014, 07:26:54 AM »
Cormorant in Guilin in China (Tamron 150-600mm at 600mm and f/8 on 5DIII)

239
Lenses / Re: Value Lens for birding
« on: April 21, 2014, 06:40:55 PM »
400 is simply too short on full frame.  I use either the 300mm f/2.8 II + 2xTC III on the 5DIII  or 70D or the Tamron 150-600mm on the 5DIII (with plenty of offerings in the Bird Portraits or the BIF threads).  Both are great fun for hand held shots with the Tammy being the best bang for bucks by a country mile and the Canon having the edge at the limits of resolution.  In my opinion both the Canon 400mm f/5.6 and the 100-400mm, both great lenses in their day and ones that I have owned, have been superseded by the Tammy. You can still take great photos with the Canons 400s but the Tammy gives extra reach and IS and is cheaper or similarly priced.  The 300mm is very expensive but is worth every cent or penny if you want that bit extra.

240
Photography Technique / Re: Am I the only one this has happened to?
« on: April 21, 2014, 02:29:04 AM »
It has happened to me with the 300/2.8.  As if a sneak photographer would to be so visible! Ironically, using an SX50 or its many equivalents of much greater range attracts no attention. 

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