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paulo_cortez

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Posts posted by paulo_cortez

    5D Mark II, Kenko Pro 300 DG 2x and EF 70-200mm f4 - AF still operational?

    in Canon EOS Mount

    Posted

    <p>Hi,</p>

    <p>Sorry for my late reply but I had to test this set before:</p>

    <p>- the <strong>5D Mk II</strong> AF remains operational and accurate!</p>

    <p>And there was no need to tape the pins, as suggested by Matthias, Steve and by Fred Miranda (http://www.fredmiranda.com/TipsPage/): even recognising f8 as the maximum aperture, the <strong>5D Mk II</strong> manages to autofocus!</p>

    <p>Also tested this combination with a <strong>5D Mk I</strong>: had to tape the pins to get any (but very inaccurate) AF response! Definitely not recommended for the <strong>Mk I </strong>unless you don't mind MF.</p>

    <p>Best regards,<br>

    Paulo</p>

    Medium format style shots with Canon EOS system

    in Canon EOS Mount

    Posted

    <p>Congratulations Ray, stunning shots! You surely know how to use that gear and your results reached that MF look I was looking for. BTW, did you use ND filters for these shots?<br>

    Right now, I'm waiting for a Nikon F>Canon EOS adapter which I ordered to test a Nikkor 28mm f2 AI-S with my 5D. Depending on the results, I might buy your lens or a 35mm f1.4L.<br>

    Best regards,<br>

    Paulo</p>

    Canon 14mm f/2.8 L II, anyone?

    in Canon EOS Mount

    Posted

    <p>Michael and Ilya, to use the Nikon <strong>G</strong> on an EOS body you need this adapter to control the aperture<br /> http://www.dpreview.com/news/1007/10072602novoflexeosnikntadapter.asp<br /> although I would never spend that money on a Nikon lens to use it on a Canon body. Only on a FF Nikon body, D700 and above!<br /> BTW, has someone read the Samyang 14mm f2.8 reviews?<br /> Finally, there's a quote which says something like this "The real price of a piece of cloth is equivalent to price you paid divided by the number of times you used it".</p>

    Medium format style shots with Canon EOS system

    in Canon EOS Mount

    Posted

    <p>Hi,</p>

    <p>First, sorry for taking so much time to reply to this post, which I started before I went to sleep, but I had a very busy day and only now, after putting my kid to sleep, I could sit in front of the PC. I also would like to give my thanks for all your very helpful and interesting replies – sincerely, I wasn’t expecting these numbers for this thread.</p>

    <p>One thing I referred in the original was “<strong>no digital post-processing”. </strong>Well, due to my poor English, some of you misinterpreted this sentence. I meant something like “<strong>no photo manipulation with photo editing software</strong>” like, for example, no background defocusing with Photoshop. Obviously and like all of you, I do almost always some post-processing with raw files. BTW, I think this shot had some background defocusing with the aid of a photo editing software – do you agree?</p>

    <p> italians

    <p>Regarding Dick Arnold’s response, the MF style I refer “ is the emphasizing of a subject by using large apertures, with shallower depth of fields but, contrary to SLR photos, with a very slight and uniform defocusing of what's outside the focal plane”. If I thought that this wasn’t possible with a SLR, I wouldn’t have started this post. I think the table link provided by Alireza helps to explain this MF style: for example, with f3.4 with 6x7, you obtain the same DOF equivalent to a f1.4 with 35mm. Therefore, MF shots have a “tendency” to have shallower DOF in relation to smaller formats, resulting in this, I call it, “style”. IMHO, this particularity is more pronounced when the subject is kept to a certain distance, not too close, not too far. If too close, the focal plane decreases in a way such that it minimizes the differences between formats. If too far, the focal plane increases, with almost everything on focus, again minimizing the differences between formats.</p>

    <p>Scott Ferris, Ken Schwarz and others referred the 35mm f1.4L as an alternative. After checking Pixel-Peeper for pictures of this lens at its maximum aperture, I’ve to agree that is a very valid alternative – not too soft or milky even wide open:<br>

    http://www.pixel-peeper.com/lenses/?lens=21&perpage=12&focal_min=none&focal_max=none&aperture_min=1.4&aperture_max=1.4&res=12&p=1</p>

    <p>I’ve a Nikkor 28mm f2 AI-S but the adapter for EOS bodies is too loose and gives very variable results. Before buying one of the referred lenses, I’ll give it a try with my 5D after buying a better adapter.<br>

    Nathan, the article by Jack Dykinga is very interesting! Thanks a lot!</p>

    <p>Paul F, love your quote about blur degree: “Unfortunately, it seems like we know more about how to control DOF than we know about how to control the degree of blur”. That’s what turns me on in MF shots!</p>

    <p>For the moment, sorry for not commenting other great responses, like Kelly’s, but I need more time to read them carefully.</p>

    <p>Many, many thanks to you all,<br /> Paulo</p>

    Medium format style shots with Canon EOS system

    in Canon EOS Mount

    Posted

    <p>Hi,</p>

    <p>Although I would like to invest in medium format photography, the required additional time for it, when comparing to digital SLR photography, compromises this step as I barely have the time for the latter. Therefore and until things calm down, I would like to try to replicate some of the photographic effects typical of medium format that I like most but <strong>using a Canon EOS system</strong>.</p>

    <p>One of these effects is the emphasizing of a subject by using large apertures, with shallower depth of fields but, contrary to SLR photos, with a very slight and uniform defocusing of what's outside the focal plane. I've posted some links to illustrate this effect.</p>

    <p>I was thinking of the following system:</p>

    <p>- Canon EOS 5D Mark II (I've a 5D but IMHO the MkII extra-pixels help taking the most from the 24mm)<br /> - Canon EF 24mm f1.4L Mark II<br /> - Neutral balance filters to use large apertures even with bright light conditions<br /> - <strong>no digital post-processing</strong></p>

    <p>Is this feasible? If yes, can you post links of similar pictures taken with Canon gear with info of how it was done?</p>

    <p>Thanks in advance for your help,<br /> Paulo</p>

    <p> The Truths about Nun and Monk:Double Dog Date /> Italians /> Italians

    <p><b>Admin edit: Images removed. As per the Terms of USE, please do not post images to photo.net that you did not make yourself. If you need to reference images from other photographers, please do so with a link.</b>

    Canon EOS 550D AF performance

    in Canon EOS Mount

    Posted

    <p>Hi again Brett W.<br>

    Thanks a lot for your constructive comments on my photographic technique.<br>

    I advise you to reply to this thread: http://www.photo.net/canon-eos-digital-camera-forum/00Wy9S<br>

    It looks like Jan also needs your expert advices on how to take great pictures with Canon gear.</p>

    <p>Brett Cole: sincerely, thanks a lot for your advices. Although I've taken almost all steps you referred, there was always a clear difference between the 5D and 450D AF performances with certain lenses.</p>

    <p>Many thanks to all repliers,<br>

    Paulo</p>

    Canon EOS 550D AF performance

    in Canon EOS Mount

    Posted

    <p>Dear Brett,</p>

    <p>Sorry but you didn't reply to my question:</p>

    <p>- What's the relation between P mode and poor AF performance?</p>

    <p>I know that these cameras are great as I bought a 450D after owning a 400D, my first digital SLR - my first SLR, 25 years ago, was a Pentax K1000 which, as you know, didn't have Program mode or AF. Most of my lenses are MF (M42, Nikon F, Pentax K, Contax/Yashica, etc.) and, when not using them with the respective film bodies, I attach them through an adapter to my 5D (the large and luminous viewfinder view that makes MF easier was one of the main reasons for it acquisition) and shoot with AV and manual modes, although the rear elements of some of these lenses may collide with the mirror.</p>

    <p>Thus not a regular poster in this site, I visit it frequently in search for answers to doubts or questions related to photography. I didn't start this thread to waist the time of the other members of this community who often very promptly and <strong>gently </strong>help me and other members. I know I'm a poor photographer (the chosen picture and my Flickr page, which is only destined to show some of my travel pictures to my family, confirm that) as I don't have the time and talent to produce the overwhelming pictures, which can be found by the thousands in sites like this one, Flickr, Pbase, etc.</p>

    <p>Anyway and though you disagree, I think I have some photographic technical notions, at least enough to understand that this AF issue is not related to the used exposure mode.</p>

    <p>Take care,<br>

    Paulo</p>

    Canon 14mm f/2.8 L II, anyone?

    in Canon EOS Mount

    Posted

    <p>Hi Erwin,</p>

    <p>Check this link where you can see hundreds of full-size images taken with this lens, although it doesn't differentiate from the MkI version (you may find this info if you click over the image like this one - Kaimon-dake(mountain) / 開聞岳(かいもんだけ) - instead of clicking over "<a href="http://www.pixel-peeper.com/redirect/?phid=3272511385&url=http%3A%2F%2Fwww.flickr.com%2Fphoto_zoom.gne%3Fid%3D3272511385%26size%3Do" target="_blank">Go directly to the full-size image</a>"):</p>

    <p>http://www.pixel-peeper.com/lenses/?lens=591</p>

    <p>BTW, I always check this site before buying a lens.</p>

    <p>And don't forget to read these reviews about the new Samyang 14mm f/2.8 IF ED UMC Aspherical, supposedly the best bang for the buck:<br>

    http://www.photozone.de/canon_eos_ff/532-samyang14f28eosff<br>

    http://www.photozone.de/canon-eos/533-samyang14f28eosapsc</p>

    <p>Best regards,<br /> Paulo</p>

    Canon EOS 550D AF performance

    in Canon EOS Mount

    Posted

    <p>Hi,</p>

    <p>Thanks a lot for taking the time to analyse EXIF data from this picture.</p>

    <p>Although I normally use Program mode with manual focus point selection for most type of situations, I guess the settings were different as previously I had lent lend the camera to my wife so she could take some pictures of my son before the wedding ceremony. I vaguely remember looking at the sets to check: speeds above equal or above 1/200 were OK for the focal length and f5.6 allowed to emphasize the fiancées from the crowd behind. If you look at EXIF data, you'll notice that Exposure Bias Value of EV0,0 (obvious for Auto mode), although as Buffdr correctly referred, it's a little bit overexposed - this issue was also frequent when using this lens with the 450D.</p>

    <p>Anyway, one thing I remember is that the AF points were blinking over the fiancées for this and many other shots (I wouldn't shoot if they were over the balcony or over the flowers inside the glass jars even if I had drunk too much previously...).</p>

    <p>Therefore, I'll keep the first answer from Mark referring the the apparent absence of AF problems with the 550D. Finally and if you allow me, I'll write the following advice to Canon gear owners before buying a new lens: above sharpness, I would first test the AF performance of a lens with it attached to my camera.</p>

    <p>Best regards,<br>

    Paulo</p>

    Canon EOS 550D AF performance

    in Canon EOS Mount

    Posted

    <p>In this wedding, for example, I was shooting from from about 4 meters, with a 450D+24-105mm f4L, pointing at their eyes and half of the shots were unusable. This wandering focus issue occurred frequently in similar situations. Although less prone, this also happened with the 400D.</p>

    Canon EOS 550D AF performance

    in Canon EOS Mount

    Posted

    <p>Hi,<br /> I'm considering buying a 550D as a back-up for my 5D but after some bad experiences with 400D and 450D AF performances, I would like to have some opinions about this aspect from 550D owners, preferably who also own EOS pro or semi-pro bodies or who owned the referred bodies.<br /> I'm asking this as I had some photos ruined (in some cases, near half) due to poor AF performance during, for example, some friends weddings with good light, contrasty subjects and fast lenses.<br /> Curiously (or not), the worst results involved lenses like the EF 24-105mm f4L and EF 24-70mm f2.8L, which have very good performance with the 5D. BTW, none of these lenses is doing back or front focus.<br /> Thanks for your help,<br /> Paulo</p>

    Leica screw mount on EOS body?

    in Canon EOS Mount

    Posted

    <p>Hi Giovanni,<br>

    It was just a suggestion because, right now, it's the only way to use your lenses with a digital body, although the 2x crop factor...unless you have the money to spend with a Leica M9.<br>

    If you're planning to use the 1DS with old MF lenses, e.g. M42, please take into account the possibility of its mirror colliding with the rear elements of some of these lenses. Nevertheless, I tried the Jupiter 9 (M42 version) and it worked OK with my 5D, something that doesn't apply to many other MF lenses which I own. Therefore, before buying one MF lens to use with your future 1DS, check this site or Google for related mirror issues.<br>

    Regards,<br>

    Paulo</p>

    Leica screw mount on EOS body?

    in Canon EOS Mount

    Posted

    <p>Hi Giovanni<br /> Forget it, i's impossible unless you find some "extreme" optic adapter, like Bob referred.<br /> I've already bought one M39>EOS and it only works well for...macro shots!<br /> I've also bought the Jupiter 9 M42 version and sold it immediately after as it was too soft for my taste. The price was 100 euros for the uncoated version.<br /> Other possibility:<br /> - sell your 1000D and buy this one<br /> http://oly43club.ru/forum/index.php?showtopic=953<br /> Regards,<br /> Paulo</p>
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