Gear discussion thread v. "I got some new gear and I got to post it here" - General

ND4 should do. Don't forget to set exposure compensation +2 though.

[QUOTE=frag4life;41962984]To don't get taken wrong, I was talking about this lens:[url]http://www.bhphotovideo.com/c/product/728343-REG/Tamron_AFA005NII700_SP_70_300mm_f_4_5_6_Di.html[/url] AF speed is quite good, but you're using a D3100, so nothing will be ultra-fast because your camera isn't capable of that. But yeah if you don't even have the money to buy a lens now, why don't you just borrow your sisters lens? [/QUOTE] not sure if this means anything since my camera still doesn't have a focus motor in the body, but its a D5200. And my sister just left for college today. [editline]25th August 2013[/editline] heres the semi-negative review i read [URL="http://www.the-digital-picture.com/Reviews/Tamron-70-300mm-f-4-5.6-Di-VC-Lens-Review.aspx"]http://www.the-digital-picture.com/Reviews/Tamron-70-300mm-f-4-5.6-Di-VC-Lens-Review.aspx[/URL]

[QUOTE=dwt110;41964474]not sure if this means anything since my camera still doesn't have a focus motor in the body, but its a D5200. And my sister just left for college today. [editline]25th August 2013[/editline] heres the semi-negative review i read [URL]http://www.the-digital-picture.com/Reviews/Tamron-70-300mm-f-4-5.6-Di-VC-Lens-Review.aspx[/URL][/QUOTE] Yes, a D5200 has a way better AF system than the D3100 and D3200 do. That's very usefull. Have another review(on Nikon and Fullframe): [URL]http://www.photozone.de/nikon_ff/619-tamron70300f456fx[/URL]

[QUOTE=rieda1589;41961712]Thinking of ditching my Yashica Electro 35 rangefinder for something that gives me a little more control before I go backpacking around Europe. Recommendations for a 35mm camera that's fairly easy to carry around for an entire month? I don't particularly want to be fumbling with lenses either. A nice rangefinder or a small SLR with an all rounder lens would be nice. I've been thinking about an OM-1 but I dunno.[/QUOTE] Are you selling?

[QUOTE=frag4life;41964629]Yes, a D5200 has a way better AF system than the D3100 and D3200 do. That's very usefull. Have another review(on Nikon and Fullframe): [URL]http://www.photozone.de/nikon_ff/619-tamron70300f456fx[/URL][/QUOTE] optical quality: 2.5-3 stars im not totally sold yet. i wish nikon would put focus motors in the damn bodies considering most other of the lower spectrum DSLRs have them from other manufacturers, it would make findling lenses a bit easier because I know people with older telescopic lenses for sale for cheap.

For a 70-300 zoom you aren't going to beat the tamron USD unless you spend much more money. For the price it's an incredibly good zoom lens for what it does.

Am I fine buying a used one? I see them for like $300 which is more within my budget

[QUOTE=dwt110;41965299]optical quality: 2.5-3 stars im not totally sold yet. i wish nikon would put focus motors in the damn bodies considering most other of the lower spectrum DSLRs have them from other manufacturers, it would make findling lenses a bit easier because I know people with older telescopic lenses for sale for cheap.[/QUOTE] Don't only read the conclusion and also the resolution test figures. Photozone is a bit harsh on his ratings, plus take into account that this test was done on FULLFRAME and not aps-c like your d5200 is which means that if the lens has good corner sharpness on fullframe it most likely will be even better on crop. [editline]26th August 2013[/editline] [QUOTE=dwt110;41965835]Am I fine buying a used one? I see them for like $300 which is more within my budget[/QUOTE] If they aren't tortured you should be fine I guess. Just test it out before you buy it if possible.

[QUOTE=notlabbet;41964854]Are you selling?[/QUOTE] Eventually yeah, it may be another 6-8 months though. And I am in the UK so shipping would be a lot.

[QUOTE=frag4life;41965841] If they aren't tortured you should be fine I guess. Just test it out before you buy it if possible.[/QUOTE] I'd do it through ebay, so I am usually really careful about who im buying from, and I found one being sold used by a legit store, and if there does happen to be anything wrong with it, which I doubt, I can just file a paypal claim

I have a super zoom, it's ok. Meh for video, there's image stabilization but no constant aperture

whats the huge appeal to constant aperture? [editline]25th August 2013[/editline] the camera doesnt have to readjust/you dont have to readjust for when you zoom in/out and the aperture changes?

[QUOTE=dwt110;41968213]whats the huge appeal to constant aperture? [editline]25th August 2013[/editline] the camera doesnt have to readjust/you dont have to readjust for when you zoom in/out and the aperture changes?[/QUOTE] It's not that big of a deal for photos, but for video, it can the world for good exposure.

[QUOTE=dwt110;41968213]whats the huge appeal to constant aperture? [editline]25th August 2013[/editline] the camera doesnt have to readjust/you dont have to readjust for when you zoom in/out and the aperture changes?[/QUOTE] The appeal is obviously that you don't lose aperture during zooming. The ISO reserves to adjust for the smaller aperture are not infinite and when you are in tele range the handheldable shutter speed reserves as well.

How to make any zoom a constant aperture Stop it down to the largest aperture that the long end allows Your lens now has a constant aperture throughout the zoom range

Alright, so now I'm convinced. I am gonna make the leap for the Tamron. Not sure where to buy from, ebay has quite a few and maybe I could bargain to a bit below 300, but B&H has one listed for $300 used and knowing B&H of course there will be zero issues with it. Thanks for the help guys!

[QUOTE=Trogdon;41969148]How to make any zoom a constant aperture Stop it down to the largest aperture that the long end allows Your lens now has a constant aperture throughout the zoom range[/QUOTE] in video though, when you zoom out you get a bright frame when the camera goes to maximum aperture then the sound of it stopping down

[QUOTE=Trogdon;41969148]How to make any zoom a constant aperture Stop it down to the largest aperture that the long end allows Your lens now has a constant aperture throughout the zoom range[/QUOTE] I tried that, when zooming in and out, the image gets brighter and then darker and vice versa. Probably because of Canon's liveview bug of some sort.

[QUOTE=garychencool;41973532]I tried that, when zooming in and out, the image gets brighter and then darker and vice versa. Probably because of Canon's liveview bug of some sort.[/QUOTE] it's the aperture changing

[QUOTE=codenamecueball;41974127]it's the aperture changing[/QUOTE] I set the aperture to f/5.6, even lower like f/11 and I still get that problem. When I zoom in and out, for some reason the aperture is changing in the lens (I can hear it) even though the aperture number as seen on the camera isn't changing.

[QUOTE=garychencool;41974228]I set the aperture to f/5.6, even lower like f/11 and I still get that problem. When I zoom in and out, for some reason the aperture is changing in the lens (I can hear it) even though the aperture number as seen on the camera isn't changing.[/QUOTE] ...yes that's what i mean the camera when you zoom opens up because it's not constant then stops down again quickly

[QUOTE=codenamecueball;41974389]...yes that's what i mean the camera when you zoom opens up because it's not constant then stops down again quickly[/QUOTE] Why does it need to do that when I'm already at f/5.6 or lower?

I've got two Praktica Film cameras for sale. [url=http://www.flickr.com/photos/communistwolf/9602364296/][img]http://farm8.staticflickr.com/7335/9602364296_d00eb4692c.jpg[/img][/url] A Praktica Nova B for £20 including UK postage [url=http://www.flickr.com/photos/communistwolf/9599133031/][img]http://farm3.staticflickr.com/2888/9599133031_fc1869738e.jpg[/img][/url] A Praktica Super TL1000 for £25 including UK postage

[QUOTE=codenamecueball;41971057]in video though, when you zoom out you get a bright frame when the camera goes to maximum aperture then the sound of it stopping down[/QUOTE] Doesn't happen on my camera when I shoot video. I used a 28-135mm f4-4.5 for a choir event and stopped it down to 4.5 the whole time and the aperture didn't shift when zooming or make any noise

[QUOTE=garychencool;41974860]Why does it need to do that when I'm already at f/5.6 or lower?[/QUOTE] aperture is determined by the amount of light is theoretically travelling through the camera. it has to physically change the size of the hole letting light through to keep it consistent. since cheaper lenses aren't designed to be used like this, they just open wide then stop down again, because it's as if they're recieving a new command. at least, that's my theory

[QUOTE=garychencool;41974228]I set the aperture to f/5.6, even lower like f/11 and I still get that problem. When I zoom in and out, for some reason the aperture is changing in the lens (I can hear it) even though the aperture number as seen on the camera isn't changing.[/QUOTE] Thats because the physical size of the hole that the aperture blades needs to create changes with the focal length The 'f' number is the ratio of the focal length of the lens to the diameter of the hole the light has to travel down So a lens @ 70mm f11 will have an aperture hole 6.3mm wide. Zoom the lens to 300mm and keep it at f11 the hole needs to be 27mm wide to get the same amount of light in because you loose light as you lengthen the tube of the lens

It's because the f-stop of a lens is calculated by focal length over diameter of aperture. To keep the f-stop constant while moving through a focal range, the diameter of the aperture has to change to keep the exposure constant. [url]http://en.wikipedia.org/wiki/F-number[/url] [editline]26th August 2013[/editline] ninja'd by Angus :'(

[QUOTE=Angus513;41975379]Thats because the physical size of the hole that the aperture blades needs to create changes with the focal length The 'f' number is the ratio of the focal length of the lens to the diameter of the hole the light has to travel down So a lens @ 70mm f11 will have an aperture hole 6.3mm wide. Zoom the lens to 300mm and keep it at f11 the hole needs to be 27mm wide to get the same amount of light in because you loose light as you lengthen the tube of the lens[/QUOTE] That explains it pretty well. I guess that's also the reason why when (using a 18-200mm f/3.5-5.6) the aperture is set to f/3.5 and I zoom in, the image gets darker (of course) but I don't hear the aperture changing. How will that work with let's say a 24-105 f/4 IS USM? The aperture is set to f/4, when zooming in how can the aperture blades get larger? Does it? Or is the lens good enough that it doesn't need to and you'll get more or less the same amount of light going through the lens throughout the zoom range?

[QUOTE=garychencool;41976161]That explains it pretty well. I guess that's also the reason why when (using a 18-200mm f/3.5-5.6) the aperture is set to f/3.5 and I zoom in, the image gets darker (of course) but I don't hear the aperture changing. How will that work with let's say a 24-105 f/4 IS USM? The aperture is set to f/4, when zooming in how can the aperture blades get larger? Does it? Or is the lens good enough that it doesn't need to and you'll get more or less the same amount of light going through the lens throughout the zoom range?[/QUOTE] Rule of thumb is cheaper lenses get physically longer as you zoom in because the inner barrel extends the frontal elements away from the back so although the actual size of the aperture hole doesn't change the ratio to the focal length does which is why the aperture drops without the blades moving Higher end lens with constant apertures don't change physical size when zooming, at shortest zoom most of the optics are at the front of the lens and then they pull back to zoom but this more than likely is more complicated and costly to construct which is why only higher grade lenses use the design The 24-105 and the 24-70 are slightly oddball. They both extend outwards but keep the same aperture, i've got the 24-105 and have tried to see how its keeping the same aperture, what is looks like is Canon have designed it so the lens hole naturally closes when you zoom out to purposely keep it @f4 throughout rather than what would probably be something like f2.8-f4 as its much easier having a constant aperture because you don't need to keep re-metering the light everytime you zoom ... but god knows how they've done it because the blades don't move when you zoom, it still does it when the lens isn't on the camera

[QUOTE=garychencool;41976161]That explains it pretty well. I guess that's also the reason why when (using a 18-200mm f/3.5-5.6) the aperture is set to f/3.5 and I zoom in, the image gets darker (of course) but I don't hear the aperture changing. How will that work with let's say a 24-105 f/4 IS USM? The aperture is set to f/4, when zooming in how can the aperture blades get larger? Does it? Or is the lens good enough that it doesn't need to and you'll get more or less the same amount of light going through the lens throughout the zoom range?[/QUOTE] mechanical linkage between the aperture blades and the zooming thing electronic adjustment only moves in 1/8th aperture stops so that might be why it jerks when you do the thing