Is the 40X lens powerful enough or will you need a bigger lens?
1522332
you have the 40 x PLUS the 10x optical so in reality you have 400x and you can go up even higher than that with the digital...I use it for looking at horse semen and you can easily see the individual sperm at 400x
1522333
It is powerful. Love everything about the microscope except we have had to send back 2 for replacements.
1522334
Depending on what your expectation is...it is close enough for what we view..which is snowflakes,hair..pretty much anything we find laying around..very cool scope..
1394636
Like the rest of the comments, you are right, it will become a 48mm lens, pretty close to what you see is what you get through the viewer. I did notice the lens it has a unique sound when it is focusing. it is pretty cool. I been using this lens for a while now, and it took me a little to get use to it. (I normally shoot with a 18- 200 zoom) so moving forward and backward to get the shot took some getting use to.
1211481
Well, it really depends on what you are trying to achieve. The new pro wide angle zoom 12-40mm f2.8 is a dream. If I were you I would put my money towards the new OM-D E-M1 camers. Check it out on Olympus USA and you will see it has a 5 star rating. Good luck.
713578
Since the D40 doesn't have in-body focusing motor, you would only be able to use it as a manual focus lens. Also, the effective focal length on your D40 is 122. I have a D300s and a D700. The focus is fast on the D700, slightly slower on the D300s. It is a superb lens, but overkill for a D40. Buy the DX 85 mm f/3.5 or the 85 mm f/1.8 for well less than half the price.
328795
I too own a D40X and want to try this lens...have a Sigma 18-200mm lens but want to get another lens that offers sharp fotos of mountains...my currents lens cannot do that, but I do love its versatility.
36981
It's not a simple choice. I sold my 12 f2 lens to get the 12-40mm. It all depends of what you are trying to accomplish. The 12-40mm is a very versatile lens which is sharper at 12mm than the 12mm at f2.8. The trade off would be losing a bit of speed from the 12mm for the sake of the convenience of not having to switch lenses as often. I kept the 45mm f.18 because it is superior than the 12-40mm in terms of resolution and depth of field which will get you much better results for portraits. Having said that, if my budget would be $1000, I would get the 12-40mm. You will be delighted with this lens. It's just awesome!I hope this helps. It's not a simple choice. I sold my 12 f2 lens to get the 12-40mm. It all depends of what you are trying to accomplish. The 12-40mm is a very versatile lens which is sharper at 12mm than the 12mm at f2.8. The trade off would be losing a bit of speed from the 12mm for the sake of the convenience of not having to switch lenses as often. I kept the 45mm f.18 because it is superior than the 12-40mm in terms of resolution and depth of field which will get you much better results for portraits. Having said that, if my budget would be $1000, I would get the 12-40mm. You... » Read More It's not a simple choice. I sold my 12 f2 lens to get the 12-40mm. It all depends of what you are trying to accomplish. The 12-40mm is a very versatile lens which is sharper at 12mm than the 12mm at f2.8. The trade off would be losing a bit of speed from the 12mm for the sake of the convenience of not having to switch lenses as often. I kept the 45mm f.18 because it is superior than the 12-40mm in terms of resolution and depth of field which will get you much better results for portraits. Having said that, if my budget would be $1000, I would get the 12-40mm. You will be delighted with this lens. It's just awesome!I hope this helps. « Show Less
909216
Get yourself a new D40 and lens for around $400.00. Sometimes used can be unreliable.
513701
It will be one heavy lens! I'd just get two 2.8 lenses to cover that distance!
1547553
I don't take a lot of sports photos but I find that on my 40D it focuses quickly and produces sharp images. With the wide aperture, you should be able to use a faster shutter speed, which would help stop the action. So I would think this would be a good lens for sports if you were close. If not, then your 70-200 mm would be better.
322288
You will need to go bigger. I have the camera and the lens and its a challenge to get that in.
2236129
It's a great portrait lens. It will be wonderful on the a d40. I think that it really comes into it's own on fx though. That way you can really take advantage of the narrow depth of field as well as precise focus .
32351
Get the biggest (smallest f-stop) lens you can afford. If you get "close to the action" a 50mm ish is adequate. If you shoot from your seat in the middle of the theater, go 85mm ish. In my opinion (worth next to nothing) money on two f1.x fixed lenses is better spent than on an f2.x zoom.
2278160
In my experience, the lens is a mixed bag for interior shots. The great part is 28mm (equiv) can capture a lot of interior space but I have to increase the ISO to capture a shot depending on lighting conditions. The 20mm is a great lens (which I totally regret selling). The drawback is that you capture less interior space because of the 40mm (equiv) focal length. But it works great in low light. Try to get a Gen 1 20mm as DXOMark says its sharper than the 2nd gen model. I had the 1 gen. model and it was tack sharp.
842971
with a Nikon D40x would it be necessary to buy an adapter? my camera has an 18-135 lens 45m
2120275
I own both lenses, but the 12-40 (24-80 in 35mm terms) with its constant f2.8 aperture and 24mm viewing angle of 84º makes it more useful to me. Statistically and chart-wise, I'm certain the 12-40 would beat the 14-45, but I've found the latter to be quite competent when used. "Mind-blowing" would not be accurate. You'd be hard-pressed to see a visual difference (unless you're an extreme pixel-peeper).
110371
Actually, I did sell my 12-60 to help pay for this lens -- they're about comparable w.r.t. image quality. The 12-40 doesn't have as wide a range of focal lengths, but is optically faster. I've also heard about a couple of examples of this lens having structural issues. But mine is holding up nicely, even in spite of a bit of accidentally rough treatment (I slipped on a muddy slope and landed on the lens).
462699
Get the 40D kit. The 28-135 is an excellent lens; I used it for years. The 40D is an outstanding camera; we sold the XTi after owning the 40D a week. Worth every penny-you will love it. By the way, I paid considerably more than what it is selling for now and I don't regret buying it when I did as I got that much extra use out of it.