October 23, 2014, 12:04:33 AM

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Messages - AlanF

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16
Lenses / Re: Wildlife lens setup
« on: September 19, 2014, 07:10:39 AM »
The Tamron 150-600mm is easily sharp enough at 600mm - if it wasn't I would always use the 300mm II + 2xTC. I post on a bird site that is an absolute stickler for sharpness. They used to reject loads of my efforts with the 100-400mm for insufficient sharpness but my latest ones at 600mm with the Tamron are invariably accepted and several getting on to the special lists.

17
Lenses / Re: Wildlife lens setup
« on: September 19, 2014, 06:59:23 AM »
You are spoiled for choice.

If you sit in a hide (blind) and use a tripod and have lots and lots of money, the 600mm f/4 II or the 500mm II are simply incredible. The I series are nearly as good, much cheaper but heavier.

If you don't mind less reach but more flexibility and be able to hand hold, and also have lots of money, the 300mm f/2.8 II plus 1.4 and 2xTCs or as seems likely the brand new 400mm DO II plus TCs are outstanding. (I don't get tired walking with and holding the 300mm f/2.8 II). The series I 300/2.8 is not as good with the 2xTC but still amazing native or with the 1.4xTC.

If you have much less money I would recommend the Tamron 150-600mm which is incredible value and as good as the 100-400mm L where they overlap and has the extra reach and better IS (I am very pleased with mine). The 100-400mm L is a very good lens and small, but you must check it out first as there are some bad ones out there. The new Sigma 150-600s are as yet untested, and the old 150-500 is not good at 500mm. The 400mm f/5.6L is a nice lens, very sharp and fast focussing but you are limited in its use as it doesn't have IS. The 300mm f/4 IS is very sharp but it is a bit short and it is not as sharp with the 1.4xTC as the 400mm native, but again it is very good value and has IS.

I started with the 400mm f/5.6 L, loved it, but changed to the 100-400 L as it was more useful to me with its IS and zoom, then did the 300mm f/2.8 II, which is my favourite, and now use the Tamron for travel as it is very good and more portable.


18
This advisory makes Sigma's USB dock look that much better,

Why is it better to pay for an accessory, when Canon has included the ability to update lens firmware directly into all recent bodies?  That's how I updated the firmware on my EF 40mm f/2.8 STM. 

Granted, if you need your supertele firmware updated (happily, mine came with the updated version), you need to send your lens to Canon...but that's their business decision (and they pay shipping), not because it's not possible for customers to update lens firmware.

Also, this advisory is over two years old.  This 'update' doesn't change anything.  All they updated was the way they stated the affected serial numbers from 'xx0xxxxxx' to specify the first two digits, most likely to avoid confusion because they've now made enough copies of at least one affected lens that the second digit incremented up.

Thanks Neuro for letting me know that this is the update I got two years ago!

19
Lenses / Re: Lens 'resolving power' vs sensors.
« on: September 18, 2014, 06:35:13 AM »
Whoa..... all of this technical talk is confusing me. Let's imagine that canon releases a 36mp full frame dslr,  will that render my "less" resolving lenses such as the 35mm 1.4L, 16-35ii and 85mm 1.2L to doo doo?
I've heard that the 24-70ii and 70-200ii are high resolving lenses and shouldn't have a problem. I wonder what happened on the Nikon side with using the same lenses on the D800 hmmmm.....

Course not! But, leaving the lens cap on and putting a pinhole through it wouldn't reap the full benefit of the high megapixel count though.

20
Camera Body Gallery / Re: Birds, Birds...with EOS 1Dx and 5D III
« on: September 18, 2014, 05:50:10 AM »
It is ruined by the writing across it!

21
I know I'm in the minority, but I sure hope the 100-400 replacement is a push-pull zoom.

Ditto

Guess there is 4 of us...at least.  I am hoping for a push-pull.
5 of us. 

22
Lenses / Re: Lens 'resolving power' vs sensors.
« on: September 17, 2014, 06:16:48 AM »
The theoretical resolution of the 12.1 mp 1/2.3" sensor of the SX50 is 323 lp/mm (1.54 µ pixels).
The theoretical resolution of the 16.1 mp 1/2.3" sensor of the SX60 is 371 lp/mm (1.34 µ pixels).

But, the Airy disk diameter for f/6.5, the widest aperture at telephoto lengths, is 8.7 µ, and the SX50 becomes diffraction limited at f/2.5 and the SX60 at f/2.2. The system is mainly diffraction limited, not sensor limited

In other words, there is no real gain in resolution using the 16.1 mp sensor and it will be noisier!

23
Lenses / Re: Canon Reveals Details for future Telephoto Lens Line
« on: September 16, 2014, 08:41:10 AM »
A very interesting read. Canon has made a real breakthrough in DO. I would love a short new 100-400mm for travel. A bit worrying, however, for all those who have invested in series II glass if it all suddenly becomes obsolete.

24
EOS Bodies / Re: High ISO Samples from the Canon EOS 7D Mark II
« on: September 16, 2014, 08:15:58 AM »
Amazing, atlease when compared to my 7D. The amount of grain at 51200 is same as what my camera gives me at 400. Good start for 7D ii. Looking forward for more reviews.

7 stops of improvement! Proves Neuro has been wrong all along about the laws of physics.

25
Site Information / Re: Noisy obtrusive ads
« on: September 15, 2014, 04:09:45 PM »
It's almost unthinkable that anyone this day and age would be using a browser without AdBlock and NoScript (I use them under Firefox).   The web is practically unusable without them, and quite dangerous.

Thanks - Adblock installed and it works.

26
Lenses / Re: What telephotos do we own?
« on: September 15, 2014, 04:03:54 PM »
How could you omit the 200-400 f4L IS 1.4x ??

Easy, but I have now added it.

27
Lenses / Re: Official: Canon EF 400mm f/4 DO IS II
« on: September 15, 2014, 10:30:15 AM »
It is a dramatic improvement, and they seem to have solved the contrast problem. However, it is now only 250g (1/2 lb) lighter than the 300mm f/2.8 II and so you pay your money and takes your choice between two outstanding lenses. I'd love to try the 400 DO. 800mm is very attractive with a 2xTC but we'll have to wait to find out what the AF is like at f/8.

28
Site Information / Re: Noisy obtrusive ads
« on: September 15, 2014, 10:20:53 AM »
Ads are a fact of life, but ones that start shouting at you without clicking a link to activate them are a step too far.

29
Lenses / Re: Official: Canon EF 400mm f/4 DO IS II
« on: September 15, 2014, 09:12:47 AM »
The price is £6,999 in UK - ouch! Here are the Canon MTFs of the 400 DO lined up against the 300 with TCs. Take care - Canon doesn't give them with diffraction included and the real f numbers are 1.4x and 2x higher with the TCs.

30
Site Information / Noisy obtrusive ads
« on: September 15, 2014, 07:32:18 AM »
Audio/video ads are being posted by Google that are activated simply by moving unintentionally the cursor over them without clicking. This activation happens when scrolling and the cursor slides over the ad. They are horribly noisy. Admin please get rid of them.

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