You do not have permission to edit this page, for the following reasons:

This IP address has been blocked from editing Wikipedia.
This does not affect your ability to read Wikipedia pages.
Most people who see this message have done nothing wrong. Some kinds of blocks restrict editing from specific service providers or telecom companies in response to recent abuse or vandalism, and can sometimes affect other users who are unrelated to that abuse. Review the information below for assistance if you do not believe that you have done anything wrong.

The IP address or range 44.199.0.0/16 has been blocked (disabled) by ‪Blablubbs‬ for the following reason(s):

The IP address that you are currently using has been blocked because it is believed to be a web host provider or colocation provider. To prevent abuse, web hosts and colocation providers may be blocked from editing Wikipedia.
You will not be able to edit Wikipedia using a web host or colocation provider because it hides your IP address, much like a proxy or VPN.
We recommend that you attempt to use another connection to edit. For example, if you use a proxy or VPN to connect to the internet, turn it off when editing Wikipedia. If you edit using a mobile connection, try using a Wi-Fi connection, and vice versa. If you are using a corporate internet connection, switch to a different Wi-Fi network. If you have a Wikipedia account, please log in.
If you do not have any other way to edit Wikipedia, you will need to request an IP block exemption.

How to appeal if you are confident that your connection does not use a colocation provider's IP address:
If you are confident that you are not using a web host, you may appeal this block by adding the following text on your talk page: ((unblock|reason=Caught by a colocation web host block but this host or IP is not a web host. My IP address is _______. Place any further information here. ~~~~)). You must fill in the blank with your IP address for this block to be investigated. Your IP address can be determined here. Alternatively, if you wish to keep your IP address private you can use the unblock ticket request system. There are several reasons you might be editing using the IP address of a web host or colocation provider (such as if you are using VPN software or a business network); please use this method of appeal only if you think your IP address is in fact not a web host or colocation provider.

Administrators: The IP block exemption user right should only be applied to allow users to edit using web host in exceptional circumstances, and requests should usually be directed to the functionaries team via email. If you intend to give the IPBE user right, a CheckUser needs to take a look at the account. This can be requested most easily at SPI Quick Checkuser Requests. Unblocking an IP or IP range with this template is highly discouraged without at least contacting the blocking administrator.

This block will expire on 12:56, 12 May 2024.

Even when blocked, you will usually still be able to edit your user talk page, as well as email administrators and other editors.

For information on how to proceed, please read the FAQ for blocked users and the guideline on block appeals. The guide to appealing blocks may also be helpful.

Other useful links: Blocking policy · Help:I have been blocked
Your IP address is in a range that has been blocked on all Wikimedia Foundation wikis. The block was made by ‪AntiCompositeNumber‬. The reason given is Open proxy/Webhost: Visit the FAQ if you are affected .
- Start of block: 13:55, 18 August 2022
- Expiry of block: 13:55, 18 May 2025
Your current IP address is 44.199.189.47. The blocked range is 44.199.0.0/16. Please include all above details in any queries you make. If you believe you were blocked by mistake, you can find additional information and instructions in the No open proxies global policy. Otherwise, to discuss the block please post a request for review on Meta-Wiki. You could also send an email to the stewards VRT queue at stewards@wikimedia.org including all above details.

You can view and copy the source of this page:

((Short description|Photographic lens))
((Original research|date=May 2010))

((Infobox photographic lens
| image        = Sigma 30mm f1.4 EX DC HSM lens.jpg
| name         = Sigma 30mm ((f/))1.4 EX DC HSM
| maker        = [[Sigma Corporation]]
| feat-is      = n
| feat-usm     = [[Image:Yes check.svg|15px|Yes]]&nbsp;Yes (not available with Pentax and Sony mount)
| feat-sbf     = n
| feat-macro   = n
| application  = interiors/portrait
| flength      = 30 mm
| aperture     = ((f/))1.4 - ((f/))16
| groups       = 7
| elements     = 7
| diaphragm    = 8
| close-dist   = 40cm / 15.7in
| max-mag      = 1:10.4
| weight       = 430g / 15.2oz.
| max-diameter = 75.5mm / 2.9in
| max-length   = 59mm / 2.3in
| filter       = 62mm
| hood         = Petal Hood
| av-horiz     = 43.6(1.5x),  41.1 (1.6x)
| av-vert      = 29.9 (1.5x), 28.1 (1.6x)
| av-diag      = 51.4(1.5x), 48.5 (1.6x)
| start        = 2006
| msrp         =
))
[[File:Canon40D Sigma30mm.jpg|thumb|300px|left|Sigma 30mm f/1.4 EX DC HSM mounted on a Canon EOS 40D, hood attached.]]
The '''Sigma 30mm ((f/))1.4 EX DC HSM''' is a wide-aperture [[photographic lens]] made by the [[Sigma Corporation]], equipped with a Hyper Sonic Motor (abbreviated HSM, Sigma's trade name for photo lens focusing technology using [[ultrasonic motor]]). The lens was produced in [[Canon EF lens mount|Canon EF mount]], [[Four Thirds System]], [[Nikon F-mount]], [[Pentax K mount]], the [[Sigma SA mount|SA mount]], and the [[Minolta AF|Sony/Minolta AF Mount]] varieties, all of the same optical formula. It shipped with a removable [[petal-type lens hood]] (62mm diameter). The lens assumes a [[crop factor]] of roughly 1.5, and therefore is ''not'' usable with on [[35mm format|full-frame]] or [[135 film]] cameras.

In 2013, Sigma announced that the lens would be replaced by a redesigned model designated as the Sigma 30mm ((f/))1.4 DC HSM A; the new lens went on sale in March of that year in Canon, Nikon, and Sigma mounts.<ref>((cite press release|url=http://www.sigmaphoto.com/article/sigma-corporation-announces-pricing-and-availability-for-30mm-f14-dc-hsm-30mm-f28-dn-and |title=Sigma Corporation announces pricing and availability for 30mm F1.4 DC HSM, 30mm F2.8 DN and 19mm F2.8 DN lenses |publisher=Sigma Corporation of America |date=March 8, 2013 |accessdate=July 25, 2013))</ref>

Its large aperture allows for a shallow [[depth of field]], allowing good isolation of close subjects. On [[APS-C]] sensor cameras, its [[field of view]] equivalent to that of a 46mm lens (Nikon DX, Pentax, Sony, current Sigma bodies), 48mm lens (Canon), 51mm lens (older Sigma bodies) or 60mm lens (Four Thirds). On the Four-Thirds mount, it is the only affordable [[normal lens|normal]], large [[aperture]] lens, therefore it is popular lens on that format.

== Optical properties ==
[[Image:Sigma 30mm f1.4 Center Resolution.png|thumb|left|Center resolution]]

((Refimprove section|date=May 2010))
The Sigma 30mm ((f/))1.4 EX DC HSM lens has unusual optical properties. With most photographic lenses, [[vignetting]] is drastically reduced by stopping down the aperture by about 1 [[f-stop]]. This lens has a more [[linear]] response to stopping down the aperture. To reduce vignetting by about one half, it is required to stop down the aperture by over 3 full f-stops. The [[optical resolution]] properties of this lens are also unique. Most lenses are typically sharp in the center of the [[Film frame|image frame]], and softer in the edges. This problem is typically solved by stopping down the lens. This lens has little response to such an effort. When stopped down by over 4 stops, the edges of the frame are still soft. However, the center resolution of the lens is high when used wide open, and becomes exceedingly high when the lens is stopped down.<ref>[http://www.photozone.de/canon-eos/298-sigma-af-30mm-f14-ex-hsm-dc-test-report--review?start=1 www.photozone.de - Test Report/Review]</ref><ref>[http://www.the-digital-picture.com/Reviews/Sigma-30mm-f-1.4-EX-DC-HSM-Lens-Review.aspx the-digital-picture.com - Sigma 30mm f/1.4 EX DC HSM Lens Review]</ref>
((-))

==See also==
*[[List of Nikon compatible lenses with integrated autofocus-motor]]
*[[Sigma 30mm F1.4 DC DN]] - lens of a different optical formula; optimized for [[Sony E-mount]] and [[Micro Four Thirds]].

==References & External links==
((Reflist))
* [https://web.archive.org/web/20050305050238/http://www.sigmaphoto.com/lenses/lenses_all_details.asp?id=3300&navigator=6 Sigma 30mm F1.4 EX DC HSM page on the corporate website.]
* [http://www.pbase.com/cameras/sigma/30_14_ex_dc_hsm Sigma 30mm F1.4 EX DC HSM image samples on pbase.com]

==External links==
((commonscat|Sigma 30mm F1.4 EX DC HSM))

((Sigma lenses))
((Four Thirds lenses |state=collapsed))
[[Category:Sigma lenses|030mm f/1.4 EX DC HSM]]
[[Category:Camera lenses introduced in 2006]]
[[Category:Micro Four Thirds lenses|Sigma 30 1.4 EX]]
[[Category:Sigma Four Thirds lenses]]

Pages transcluded onto the current version of this page (help):

Sigma 30mm f/1.4 EX DC HSM lens (edit)
Template:- (view source) (template editor protected)
Template:Ambox (view source) (template editor protected)
Template:Cite press release (view source) (protected)
Template:Clear (view source) (protected)
Template:Commons category (view source) (template editor protected)
Template:Commonscat (view source) (template editor protected)
Template:F/ (view source) (semi-protected)
Template:F//sandbox/styles.css (view source) (semi-protected)
Template:Four Thirds lenses (edit)
Template:Four Thirds lenses timeline (edit)
Template:Hlist/styles.css (view source) (protected)
Template:Infobox (view source) (template editor protected)
Template:Infobox photographic lens (view source) (semi-protected)
Template:Main other (view source) (protected)
Template:More citations needed (view source) (template editor protected)
Template:More citations needed section (view source) (template editor protected)
Template:Navbox (view source) (template editor protected)
Template:Navbox bottom (view source) (extended confirmed protected)
Template:Navbox top (view source) (template editor protected)
Template:Original research (view source) (template editor protected)
Template:Pagetype (view source) (protected)
Template:Plainlist/styles.css (view source) (protected)
Template:Refimprove section (view source) (template editor protected)
Template:Reflist (view source) (protected)
Template:Reflist/styles.css (view source) (protected)
Template:Replace (view source) (protected)
Template:SDcat (view source) (protected)
Template:Short description (view source) (protected)
Template:Short description/lowercasecheck (view source) (protected)
Template:Side box (view source) (template editor protected)
Template:Sigma lenses (edit)
Template:Sister project (view source) (template editor protected)
Template:Sp (view source) (template editor protected)
Template:Template other (view source) (protected)
Module:Arguments (view source) (protected)
Module:Category handler (view source) (protected)
Module:Category handler/blacklist (view source) (protected)
Module:Category handler/config (view source) (protected)
Module:Category handler/data (view source) (protected)
Module:Category handler/shared (view source) (protected)
Module:Check for unknown parameters (view source) (protected)
Module:Citation/CS1 (view source) (protected)
Module:Citation/CS1/COinS (view source) (protected)
Module:Citation/CS1/Configuration (view source) (protected)
Module:Citation/CS1/Date validation (view source) (protected)
Module:Citation/CS1/Identifiers (view source) (protected)
Module:Citation/CS1/Utilities (view source) (protected)
Module:Citation/CS1/Whitelist (view source) (protected)
Module:Citation/CS1/styles.css (view source) (protected)
Module:Disambiguation/templates (view source) (protected)
Module:Infobox (view source) (template editor protected)
Module:Infobox/styles.css (view source) (template editor protected)
Module:InfoboxImage (view source) (template editor protected)
Module:Message box (view source) (protected)
Module:Message box/ambox.css (view source) (protected)
Module:Message box/configuration (view source) (protected)
Module:Namespace detect/config (view source) (protected)
Module:Namespace detect/data (view source) (protected)
Module:Navbar (view source) (protected)
Module:Navbar/configuration (view source) (protected)
Module:Navbar/styles.css (view source) (protected)
Module:Navbox (view source) (template editor protected)
Module:Navbox/configuration (view source) (template editor protected)
Module:Navbox/styles.css (view source) (template editor protected)
Module:Navbox top and bottom (view source) (template editor protected)
Module:Pagetype (view source) (protected)
Module:Pagetype/config (view source) (protected)
Module:Pagetype/disambiguation (view source) (protected)
Module:Pagetype/setindex (view source) (protected)
Module:Pagetype/softredirect (view source) (protected)
Module:SDcat (view source) (protected)
Module:Side box (view source) (template editor protected)
Module:Side box/styles.css (view source) (template editor protected)
Module:String (view source) (protected)
Module:Unsubst (view source) (protected)
Module:WikidataIB (view source) (template editor protected)
Module:WikidataIB/nolinks (view source) (template editor protected)
Module:WikidataIB/titleformats (view source) (template editor protected)
Module:Wikitext Parsing (view source) (protected)
Module:Yesno (view source) (protected)

Return to Sigma 30mm f/1.4 EX DC HSM lens.

Retrieved from "https://en.wikipedia.org/wiki/Sigma_30mm_f/1.4_EX_DC_HSM_lens"