August is just weeks away.
The Sigma 50-500 OS arrived yesterday so I took it down to the local river to photograph the geese and ducks swimming around... Yes, I'll be doing sharpness, resolution and front/back focus tests on the thing, but since it's going to be used hand-held, I figured some fer-real hand holding shooting was in order...
Had a bizarre thing happen. Lens was acting wonky, not focusing, jumping past infinity, and such. At the same time I realized I couldn't change the aperture or shutter speed on the D300 OR bring up any menus....
At home I tried different lenses on the D300, and the 50-500 on the D2X. I figured out I had a problem with the MBD10 on the D300. Some rotary dial or switch was sticking and things were acting badly... Which was VERY good 'cause of the first 320 images I shot over half were visibly out of focus.......
So, disassembly, contact cleaning, flipping of switches, and some "percussive" maintenance (banging it on the desk) of the MBD10 battery pack, and all was working well again... BACK to the river to try again, and now things went much better. The Sigma appears sharp and quick to focus, and the OS appears to do a good job. I got sharp images down to 1/60 @500mm, which is reasonable. I'll try pressing the limits later and see what happens as I try to get that last "stop" out of the OS, but I figure all
the manufacturers do their stabilization testing using marine snipers with absolutely still hands and no heartbeats, so I figure an old fart like me with a little hand shake is happy getting 3 stops.....
I shot the 80-400 side-by-side with this one and both were sharp, BUT, it was clear the much slower focus on the 80-400 was costing me shots. I"ve gotten used to it, but in some situations it's a liability.
Today I tested front/back focus and up-close sharpness, and it appears pretty good. At 50mm it backfocuses about 2mm, but by 100mm it's dead on and stays there all the way through 500 mm. I"m planning on hitting the butterfly house tomorrow so I"m going to give this thing a try hand-held for butterflies......
I picked up the Nikon 70-200 AF-S ED VR II and the Nikon TC-20E III a couple days ago. I had a long, involved recitation of how both the Nikon and the sigma 50-500 OS performed and compared.......
And then I realized y'all already KNOW how good the Nikon 70-200 is (and the equivalent Canon 70-200), so I shortened things a TON..........
Bottom line - nothing touches the 70-200 for autofocus speed, accuracy, and vibration reduction. Sharpness is fantastic, as it should be for a zoom with such a short range. Even WITH the 2X, it's STILL very good.
Against the Sigma, with the 2X on the 70-200, I'd say the autofocus of both lenses is the same - or so close that I can't detect any perceptible difference in NORMAL use. Racking both from minimum focus to infinity, the 70-200 is a little quicker, but how often do we do that? The VR versus OS seems a draw too... Sigma SAYS the 50-500 MAY take up to a second for the OS to stabilize, but in my use I've found it to be quite a bit faster than that.
And SHARPNESS... Without the 2X, the 70-200 is sharper. It's sharper than any other lens I have except a prime like the Nikon 500/f4... WITH the 2X, it's still extremely good, as is the 50-500. Again, I'd have to say it's a draw......
Without the 2X, the 70-200 is nothing short of awesome. With the 2X, I'd say the lenses perform VERY similarly. The Sigma focuses a bit closer and has a wider zoom range. With the 2X on I'd say the weights are pretty close.
Anyhow, the bottom line for me is I'll likely hang onto both lenses and use each for what it does best...... I'll try the 2X on my 500/f4, and if it's fantastic I'll keep it. Otherwise, I'll return the 2X.
Hello,
Sorry for interfering in this discussion... I am new in this forum dedicated to birds, even if I am more interested in metal birds (aircrafts).
I also own the Nikon 80-400 VR and I agree with you about the slow AF. Nevertheless, I can handle this by using the limiting switch and by preparing the shooting sequences, which is certainly easier with aircrafts than with birds. Using continuous AF gives correct results.
In my opinion, the biggest problem is the image sharpness at 400mm, especially with maximum aperture (5.6). Whatever I do, I can't get sharp images. The strangest thing I noticed is that the image is softer on the left part than on the right part. If the aperture is 8 or higher, the result is much better but the light is not always enough to get f8 at high speed.
Did you also notice this sharpness problem or do you think my lens has a problem? I would really like to have your opinion about this.
Eric
PS. I can provide pictures showing the problem I am talking about.