If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Which DSLR to look for on ebay ?
On Sun, 27 Sep 2009 08:41:38 -0700 (PDT), J_P_S
wrote: Hi I have never used/owned a DSLR camera. I have a digital point and shoot camera. Want to buy an earlier model DSLR to take some close up shots of electronic parts. Which camera I should be looking for? I am on low budget. How much Mega Pixel? Is it possible to use the lens of earlier film SLR cameras on DSLR? If yes Can i buy a body of DSLR and and and compatible lens of film SLR? Which combination to look for? thanks and regards. If your P&S camera has a threads for a filter you can use a reverse-adapter ring (also called a macro-coupling ring) to mount your old SLR lenses on it in reverse. You can get images better than any DSLR because the P&S camera affords you much more DOF than any DSLR + lens can ever provide. Go to Adorama and enter this in their search: macro coupling For $8-$14 you can have macro images with a P&S camera that clearly rival anything you'll ever get with any DSLR, no matter how much money that you throw at it. |
#2
|
|||
|
|||
|AX| Which DSLR to look for on ebay ?
Name-changing anti-DSLR Troll wrote:
If your P&S camera has a threads for a filter you can use a reverse-adapter ring (also called a macro-coupling ring) to mount your old SLR lenses on it in reverse. I assume there's something more balanced to use but that general approach should work, or just a P&S with macro mode. You can get images better than any DSLR because the P&S camera affords you much more DOF than any DSLR + lens can ever provide. That is the typical bull**** and lies which this name-changing troll is known for. DSLR macro lenses can stop down for whatever DOF needed and open up much further than P&S. However, P&S is going to be a lot easier and cheaper unless you have some very extreme needs and more budget, that's probably the way to go. You'll probably want some software to correct the barrel distortion. Go to Adorama and enter this in their search: macro coupling Nope, that doesn't help at all. Ignore this lying fanatic quack ASAP. For $8-$14 you can have macro images with a P&S camera that clearly rival anything you'll ever get with any DSLR, no matter how much money that you throw at it. Here's a helpful discussion: http://photo.net/digital-camera-forum/00RaOq If you can be much more specific about what size subject and what size end result, we can make more suggestions. I could recommend a cheap bellows 35mm setup for extreme magnification if that's what you need but it's not going to be easy to learn the ropes and get a system working for your needs. Once it's figured out, it's just an easy click so if you need such a thing for long term use under controlled conditions in an office/lab then it's worth doing. It might looks something like this: http://www.flickr.com/photos/edgehil...7603231101723/ and could be done for maybe $600 and up. |
#3
|
|||
|
|||
Which DSLR to look for on ebay ?
On Sun, 27 Sep 2009 20:42:42 -0700, Paul Furman
wrote: That is the typical bull**** and lies which this name-changing troll is known for. DSLR macro lenses can stop down for whatever DOF needed and open up much further than P&S I see. So now you are claiming that a smaller sensor camera doesn't have superior DOF over a larger sensor camera. Whereas you DSLR-Trolls are continually claiming that a smaller sensor camera can't provide the shallow DOF that a larger sensor camera can provide. (Which is also a lie because all one needs to do is increase the focal-length to get the same shallow DOF as any DSLR lens.) C'mon now, which one is it? F/2.0-f/2.4 on a P&S camera is more than anyone might need for large aperture. And combined with the greater DOF they excel for macro photography. Hand-held available-light macro photography with any decent P&S camera is a cinch. A DSLR requires that you use flash, tripods, frame-stacking, and you have to jump though all kinds of hoops to get a useful DOF for macro-photography. Whereas if you open up a DSLR lens then you get a DOF so narrow that you can't even get more than one bit of dust in focus at any one time. You sure are an ignorant DSLR-Troll. You prove it over and over again. How's that pretend-camera working out for you in your pretend-photography career in your virtual-life online? |
#4
|
|||
|
|||
Which DSLR to look for on ebay ?
Nutbag wrote:
I wrote: DSLR macro lenses can stop down for whatever DOF needed and open up much further than P&S I see. So now you are claiming that a smaller sensor camera doesn't have superior DOF over a larger sensor camera. ... continually claiming that a smaller sensor camera can't provide the shallow DOF that a larger sensor camera can provide. Both. DSLRs can stop down and open up, P&S can't open up much. all one needs to do is increase the focal-length to get the same shallow DOF as any DSLR lens.) Sometimes that's possible but the options are much more limited. C'mon now, which one is it? F/2.0-f/2.4 on a P&S camera is more than anyone might need for large aperture. Not even close (except at very long zooms) and there is a strategic price to pay for that. And combined with the greater DOF they excel for macro photography. Hand-held available-light macro photography with any decent P&S camera is a cinch. A DSLR requires that you use flash, tripods, frame-stacking, and you have to jump though all kinds of hoops to get a useful DOF for macro-photography. No, you can stop down just as far and raise the ISO for the exact same math. Or keep the ISO low & use a tripod. And/or keep it open & focus stack or a bunch of options. Yes it's simpler to use a P&S and I'll bet that's all the OP needs. Normal laws of physics apply though, no magic. Whereas if you open up a DSLR lens then you get a DOF so narrow that you can't even get more than one bit of dust in focus at any one time. A grain of dust that the P&S could not capture at extreme magnifications with limited light. You can always mount a P&S on a microscope, given the budget. Or mount a DSLR on a microscope for even better performance and more budget. It depends what you need. The laws of physics will not bend though, no matter your choice, needs or bias. |
#5
|
|||
|
|||
Which DSLR to look for on ebay ?
On Sun, 27 Sep 2009 22:13:22 -0700, Paul Furman
wrote: Both. DSLRs can stop down and open up, P&S can't open up much. Stop down any DSLR lens for enough DOF for macro photography and you are then limited to artificial looking images taken by flash. There's no way around it and you know this, if you know anything at all about photography and cameras, you ****ing useless pretend-photographer DSLR-Troll. |
#6
|
|||
|
|||
Which DSLR to look for on ebay ?
the Ignorant DSLR Trolls wrote:
F/2.0-f/2.4 on a P&S camera is more than anyone might need for large aperture. If you can't have f1.4 then f2 is all you "need". After all, of what use is a shallow depth of focus? And combined with the greater DOF they excel for macro photography. The idiot troll doesn't know the difference between macro and low-light. Hand-held available-light macro photography with any decent P&S camera is a cinch. A DSLR requires that you use flash, tripods, And when the troll starts lying his ass off you know that he's lost any argument he was trying to win. -- Ray Fischer |
#7
|
|||
|
|||
Which DSLR to look for on ebay ?
|
#8
|
|||
|
|||
Which DSLR to look for on ebay ?
J_P_S wrote:
Thanks for the replies and information. I want to take the pictures for web publishing only not for taking prints. I want to take pictures like these where the number etched on glass is also visible. http://www.tubemongerlib.com/gallery...lgium.jpg.html I have sony V1 http://www.dpreview.com/reviews/sonydscv1/page2.asp Well, that doesn't look too difficult in terms of what the camera requirements are! Your Sony will focus down to 10cm, according to the specs, and while I'm not sure what the actual magnification is at that distance, it most likely is more than you'll want for most vacuum tubes. The problem you'll have is trying to get the lighting adjusted to see the "number etched on glass". It is actually painted on, not etched, and it is pretty easy to rub it off in many cases (particularly older, pre-WWII tubes). You'll find that when you look at such tubes it's necessary to roll the tube around and get it positioned just right to even read the numbers. Photographing them is even harder if for no other reason than that you need a lot more light, which generally means more reflections. Whatever... for web publishing of course you don't need more resolution than about 800x600, so even a 2MP camera is overkill. For 8"x10" prints, probably 6MP is enough, though 10MP provides a lot of room to crop if need be, and even at 3.5MP you'll usually get decent prints. (For very high quality prints, figure 300 pixels per inch or 7.2MP for an 8x10; for just good prints figure half that.) If you never do anything smaller than an entire tube at once, magnification of 2:1 is enough (and hence many lenses with a "macro mode" will work just fine). If you might want to get a shot of one pin, or just the base, or something like an internal connections seen through the envelope, go for either a 105mm macro lens or a 90mm that can do 1:1 (virtually all 105mm macro lenses will do 1:1, but not all 90mm lenses will). You'll probably need to use a "light box" or a tent, with a couple of flash units. The basic idea is highlhy diffused shadowless light with no reflections off the glass. -- Floyd L. Davidson http://www.apaflo.com/floyd_davidson Ukpeagvik (Barrow, Alaska) |
#9
|
|||
|
|||
Which DSLR to look for on ebay ?
On Mon, 28 Sep 2009 04:47:35 -0700 (PDT), J_P_S
wrote: Thanks for the replies and information. I want to take the pictures for web publishing only not for taking prints. I want to take pictures like these where the number etched on glass is also visible. http://www.tubemongerlib.com/gallery...lgium.jpg.html Any decent P&S camera can handle images like that. Just use some multi-coated close-up filters in diopters of +2, +3, or +4 (the +4 made by stacking +1 with a +3). Even if your camera doesn't have filter-threads to attach filters you can still just hold the close-up filters over the front of the lens. I've done that plenty of times with simple magnifier lenses when I didn't have good achromat close-up filters readily available or if the camera didn't have filter-threads on it. Something like the images you need isn't even a challenge for a P&S camera. A P&S camera's extended DOF will easily keep all the tube markings and internal tube elements in focus. With a DSLR you'll be lucky to get just part of one number in focus due to their extremely shallow DOF for something like this. Many P&S cameras also have built-in macro modes where you don't even need the close-up filters. The Canon Powershot cameras for example can focus as close as something touching the front lens element. Judging by the extreme DOF portrayed in your sample image I strongly suspect that it was taken with a good P&S camera. No DSLR nor its lenses on earth can provide that much DOF for a macro subject of that size. Capturing the white letters etched on the glass is a lighting issue, not a camera issue. If lit correctly any camera on earth will capture them properly. I have sony V1 http://www.dpreview.com/reviews/sonydscv1/page2.asp regards That Sony V1 is perfectly capable of doing the photography you need. Just learn how to use it for this kind of subject. From that review it shows that you can also attach conversion lenses to it, so there must be some filter-threads or a filter adapter that you can use on that camera too, to attach close-up filters if needed. See bottom of page 4 of that review, under accessories. Have you even tried the macro mode in that camera first? It will focus from 3.9 to15.7 inches (10-40 cm). That should be more than enough close-focusing for the kind of subject that you want to photograph. Even if not, since you'll only be posting images to the web, you can always shoot from further away and then crop down to the part of the image you need. You don't need all 5 megapixels of resolution for a simple web image. |
#10
|
|||
|
|||
Which DSLR to look for on ebay ?
J_P_S wrote:
Thanks for the replies and information. I want to take the pictures for web publishing only not for taking prints. I want to take pictures like these where the number etched on glass is also visible. http://www.tubemongerlib.com/gallery...lgium.jpg.html Well, those tubes are a difficult subject. But the problem is not so much the magnification or the camera but the setup and in particular the lighting. You want an even, bright light without nasty reflections and that will require some learning. I have sony V1 http://www.dpreview.com/reviews/sonydscv1/page2.asp Does it have a "macro" mode? While a SLR will give you much more control over parameters your camera in macro mode is probably sufficient to get close enough for an enlarged picture. And for web publishing you really, really don't need a 15MPixel camera, a 1MP camera would be more than adequate. jue |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Ebay DSLR sleaze (be afraid!) | RichA | Digital SLR Cameras | 8 | April 9th 06 02:03 AM |